#tumblr/3 Canal | Explore Tumblr posts and blogs

vyzz-undercover · 3 months ago

Text

im insane have a few kilos of:

[cato/f!ambassador]

(1) (2) (3) (4) (5)

(6,600ish words) (please fucking sedate me)

{i dont usually write in whatever perspective having a 'you' in this sort of context is, so forgive any oopsies besties!!!}

CONTENT WARNINGS:

•slight dubcon

•hints of size kink

•intercourse [M/F]

•degrading language

•mild possessive behaviour

•pisspoor cliche of 'oh no you're freezing haha body warmth eh?' trope

•mr. sicarius' insufferable ego

•tumblr's dogshit formatting from phone notes to the app

———————————————————————————————————

super special thanks to all the writers im too much of a spineless coward to actually @ because i only ever lurked on anon asks on old main for, like: moodymisty, mothiir, lemon-russ, the-raven-lady, scriberye and many others. you're all the unknowing reasons why i made an alt to post this, cheers for your amazing works and ideas!!! :3

———————————————————————————————————

It was doomed from the start, honestly.

Not to say he had any hope that an assignment would ever actually go easily for once.

It's supposed to be an apparently simple diplomatic procedure. Namely, you get to stand around, run your ambassadorial trap and bat your lashes and trollop about in front of pompous baseline fools. While he, Cato Sicarius, stands at attention in pissy formal wear; pretending like he's not a hair-breadth from an aneurysm watching it all take place.

Oh, and not to forget the brother who's a head taller than him, in full plate, and isn't being held to a standard of mock-humility.

He realises belatedly he's forgotten the Primaris' name. That shouldn't happen. He never used to forget things. Eidetic memory shouldn't let him. He shouldn't be able to—or, well—maybe his subconscious deigned it unimportant and emptied it out the proverbial airlock of his mind. It was admittedly largely inconsequential. He'd been told, surely. He remembers he was a Sergeant of some sort from his markings. He also remembers being gawked at by the Primaris, borderline felated by eyes alone. He's Cato Sicarius, afterall. Grand Duke of Talassar and High Suzerain of Ultramar—of course he'd been inspiring awe. But for some warp-damned reason, alongside all those great titles, his Father'd decided to add Master Babysitter of His Ambassador to the list. But Cato does doesn't let it bother him. He's always got better things to occupy his time. Like furiously glaring at you across the thunder-hawk, even if you'd been dead-set on counting the rivets in the floor plating.

You'd looked absolutely idiotic in an Astartes troop seat. Like a toddler in an adult-sized wheelchair, draped in furs that seemed a size too big; hiding a dress that looked a size too small.

Simply put, the entire assignment was to be an event in circle-jerking—until shit hit the fan with all the painful similarity of a Nurgling thrown headlong into a thruster engine.

To begin with, it was a trap—a trap where he's separated from brother-Sergeant 'whatever-the-fuck-riel' in the commotion and responding bolter fire. That'd left Cato pointedly responsible for evacuating you, the useless little chatterbox, by the scruff of your fuzzy coat through side halls.

On another note, of all the accursed biomes, he hates tundras the most.

Pointedly, it's exactly what seventy percent of this backwater, shit-hole planet is this time of year; whereas the other thirty percent is glacial mush.

He discovers firsthand just how much sloshy ice-water there is to be found as he kicks in a shutter door and gets doused for the first time of many to follow; only to vault from the eastern rampart. Sliding down a long, raised and sleet covered run-off canal that passed over the keep's lesser residential rooftops with you in his grasp.

Melt water soaks you both as he scrambles fights to a halt on the steep decline before the drop off. Wobbling balancing on the edge for a second before he manages to scud back up and down a side chute, worming through the raucous hellscape of filthy baselines and too-tight alleys into the scrappy frozen wilds.

There was little time to hesitate when he decides breaking into a dead-sprint with a soggy ambassador thrown over his shoulder's the modus operandi of the situation.

He didn't stop until he was at least fifteen clicks away, or rather—he only stops when he's able to recognise a spot to hide and await for emergency evacuation.

A half-standing shack. Probably some peasant's hunting hovel. Clearly in poor condition, and honestly, a cave would've been preferable—but he isn't about to pass up the opportunity.

The door doesn't even swing open when he nudges it with his elbow. No, it falls inward, because of course it does, and he grumbles belatedly when it thuds.

The inside of the structure is a damnable mess, but, at the very least, it's dry.

He moves to tug you off his shoulder and toss you onto a pile of rags in the far corner, but he hesitates periodically. Even through his own wet outer attire, he can tell very little body heat is coming off you. His hearing catches on the way your breathing labours below the incessant chatter of your teeth.

Some wretched part of him implores he let you down carefully next to the nested mess of dirty cloth; and for once, he acquiesces to granting mercy.

You curl up into a ball on the floorboards almost immediately.

In his eyes, you're the pict of some drowned rat. The fur coat you'd been wearing over your dress is just as soaked through as everything else. Your hair is full of small, frozen rivulets at the ends, mixed in with powder snow and ice; and all the while, you're whining softly and trying to coil tighter into a fetal position.

He's trying very hard not to just stand there and dumbly listen to your little noises of weakness like a salivating dog.

Instead, Cato turns and lifts the door back into place against the frame; then he activates the honing beacon on his belt.

No latency pings, no close contact.

He grumbles again, eyeing your shivering form over his shoulder begrudgingly.

He hates you.

He hates that he's the one who's responsible for you.

The fact he is also currently out of his power-armour because of this charade only makes him even more irate, impossibly.

Sure, he has his combat bodyglove on under the tacky regalia, but it's no real consolation. He'd feel a lot better if there was a couple extra hundred kilos of plasteel and ceramite on him.

He could've had his armour on, had someone else been the one to babysit you.

He would have preferred anything but sole custody of your wretched, annoying existence falling on him. But because he's the only competent Astartes around ninety percent of the time, and you're the root of all problems—it means he's the only one who's capable of handling your stupidity. He can't even imagine letting anyone else do it. You'd probably deafen Trajan with your yapping if he was in his stead. Or Prabian. And if Titus had watch of you, you two'd probably be—ugh, he won't even dignify the thought. He can't believe the man'd been Captain of Second Company before him, or how or why Agemman gave the captaincy to him. He understands why Titus'd been struck from most records aside from high clearance. To say nothing of the fact that one would think being a Blackshield for a century would humble someone. But no, it seems crossing the Rubicon Primaris gave him his balls back.

Cato had almost flown into a blind rage when he'd heard him jokingly warning about rough weather to you on the embarkation deck the last time you'd been in each others general vicinity—because oh, of course Lieutenant Titus is suddenly a subsector-renowned fucking comedian as soon as you're there. Cato ought to subpoena the dribbling Inquisition like that little snake Leandros did. See how Titus'd like a real stage to perform on again. Maybe they'll have a new rendition of the cunted Rubicon Primaris to piece his sorry fat-arse back together once more by then. But he won't. He won't because Marneus would sulk, and Cato would feel bad. Plus, Cato's infinitely more likely to kill an Inquisitor than help one. But you—you little skank—you find Titus so funny. Hiding a giggle behind your hand, pretending to look demure and professional despite your wretched nature.

Why don't you smile at him like that?

You would be the death of him.

It was always all because of you. Every single time. Because you're so useless in any situation that can't be rambled out of. Which is all of them when you're involved, in Cato's opinion. His Father should leave the talking to professionals who wouldn't break a hip from a smack on the rear.

But now you are going to die of hypothermia, like a typical, pathetic little baseline—well, unless you start following his orders.

Cato tries not to think of how you were acting when rounds started going off earlier. Of course, like a spooked animal, you'd been all ears to his commands then. Hiding against him with your hands pawing at the side of his dress uniform as bullets careened across the dining hall, looking up at him with those big, terrified, caught-in-the-crosshair eyes—and, Throne, it had been so easy to pick you up. You were so soft flimsy, he could fling you around like a rag-doll if he really wanted. Manhandling you would be a singlehanded venture. He's liable to just hoist you up whenever you think yourself bold enough to bother him next. Grab you by your uniform's scruff and just pin you against a bulkhead, you'd be bent at the perfect height to—no—no, no.

Abruptly trying to distract himself, Cato draws his blade from it's ceremonial sheath and activates the disruption core, trying to stoke some sort of heated spark as he drove it into the fireplace.

He brutishly nudges it amidst the old wood and long dim coals. It isn't his finest moment of critical thinking, but it seems to be working; seeing as a few weak embers sputter to life.

Gratingly, he's aware that even a servitor would've known starting a fire in hostile territory was a fool's surest way at getting caught—but he has no other choice. Either he acts the moron and plays his poor hand, or you die from the shock of your chill; and if that happens, he'll have to face his Father's wrath.

And Guilliman would have his left testicle as a paperweight if you died under his watch.

In conclusion, if Cato is to choose between stupidity and complete failure, he's opting for stupidity. Which aggravatingly felt like an ongoing occurrence, ever since you started existing anywhere near him.

He reaches for your soggy swaddled form, and tugs.

Even practically hypothermic, you've still got enough of a two-faced-bitch's spirit hidden away in you to hiss and swat at him blindly. So much for his Father's claims you were of 'sweet, kind temperament.'

For a moment, he genuinely wants to throttle you for the outburst; but he swallows down the urge.

"You need to get out of those," he snaps, glowering down at you. "Or you are going to die."

Your response is a poignant little groan as you glance dizzily around the room.

Cato huffs, "There are blankets beside you, fool."

He holds up a dingy plaid throw, half fraying and stinking of stale mould. It was an assault on his vomeronasal organ, but he wasn't about to let you act the typical spoiled cunt routine of an Imperial ambassador. He would have you wrapped in it sooner rather than later, wether you liked it or not. You dying reflects poorly on him, afterall.

"T-T-Turn, p-p-please—" you say, but your stammering mangles the words into a juddering mess.

He growls, almost tempted to snarl something about 'the fucking audacity in thinking you can tell him what to do—' but acquiesces out of sheer force of will and pivots on his heel, settling into a martial line stance.

Cato can hear you struggling to wriggle free of your clothes. The whines of effort and heavy breathing, to say nothing of the almost comedic slop sound one miscellaneous article makes as it hits the rotted wooden floorboards.

Even if he's taking it to his grave, he's admittedly itching to look over his shoulder.

It's a completely degenerate urge.

But he's—he's wanted this. He's wanted this exact opportunity.

He's got it, now.

You're alone with him.

Nothing and nobody to distract or detract from your attention finally being all on him.

You make a fey little groan, and he takes that as a signal you're finished.

He rounds about-face, and, for lack of a better word, ogles the shape of your covered form.

You've dragged that pile of rags closer to the meagre fireplace, lying on it with the plaid blanket strewn over the top of you.

Even completely hidden beneath, he can see you are still shaking under the ratty thing. Even moreso than before, in all actuality. He supposes that's a good sign. It proves your feeble body is still well and keen on living.

But the suffocating concept you're bare weak, soft useless and needing pathetic underneath that scrap of fabric worms its way into his brain like a cancer.

He grits his teeth so hard his jaw aches.

Tearing his gaze away, he finds the embers his blade coaxed are a small flame eating away at the old timber now.

Looking back, your shivering's subsiding, but your rapid breathing is increasing; which is surely not good.

He has an idea, which definitely isn't influenced by depravity at all—shut up.

Cato tries for a moment to actually unbutton his attire. His fingers are too large, unsurprisingly. And with the body-suit, he's got no leverage of a nail or two to do away with the dainty fasteners. So, ultimately, he tears the regalia down the front, sending buttons flying—and continues to pry and rend the sopping garments off his arms and legs until they're a pile at his feet.

Then he sets about a more strenuous matter. He releases the locking mechanism at his clavicle, and promptly undoes the thick claps over his pectorals so he can pop free the catches beneath, peeling the layered material back and shucking his arms and hands loose of their constraints.

The top of his bodyglove hangs around his hips now, and he sighs. The chill is of no real annoyance to him. He's built to endure most conditions. Sure, it's cold—but Astartes run hot. And right now, he's boiling for so very many accursed reasons.

He settles on his side next to you and scuds himself to bracket the pile of fabric.

"Move closer," he bites out.

He tries not to groan when you actually do, and surprises himself when he manages to stifle the sound. Even through the blanket, he imagines his warmth is a welcome change to freezing.

"T-Thank you," you say softly, soaking in his body heat like a banal reptile under a sun's rays.

He likes hearing timidity on your lips.

He supposes it stems from his habit of humbling you. The opportunities are unsurprisingly plentiful. He often finds enjoyment hearing you back-pedal when he would cut you down for so much as genially inquiring on Astartesian discussions. Putting himself in the middle and shutting you out, even if you were welcomed in them prior to his arrival.

If you want to ask something of his Brothers, it'll be his answers.

All it ever took was a growl and a curt reminder to know your place. Then you'd fumble and take two steps back. Snipped down to size as you ought to be. Forced to suffer an ounce of the shame he feels. Oh, and then your big doe-eyes'd cast down at Cato's ceramite boots, fussing; trying to apologise to him.

In truth, it's adorable pathetic to watch.

You look so hurt.

It's an act, he's sure of it.

You play at being difficult to anger, and that makes you just that bit more grating. You've unknowingly caught him with an unfair advantage. One that his prowess as a statesman and a warrior cannot seem to scratch. He's always left feeling robbed in your presence. In a way that furiously giving in to the alien urge of palming himself afterwards doesn't ever fix. He's toey and irked to be excluded when you talk to other Astartes, but simultaneously darkly glad that you shy from such antics with him.

It's paradoxical, yes. But no, he's not a hypocrite. Though some part of him is scolding him for being one. No, he's aching to sink his proverbial claws into you—though he won't ever say it to a soul. He won't because he knows he's not supposed to have tastes such as this. A pit in his gut taunts that the stint he'd suffered in the Warp is to blame. But he's the commander of Roboute Guilliman's Victrix Guard. He is not aberrant. The sidelong, fraction-of-a-second glances Cato receives from his Primarch when you enter his office to give briefings surely mean nothing.

It's clear why you have his Father's favour, but he'll never admit that either. Aside from Guilliman's desperation to find baseline company for some strange reason. You're surely just a pet to him. Like a small rodent he pries off a little wheel and sets out in a clear sphere to roll about on the bridge, or something.

To say nothing of his brothers' behaviours.

They won't show it in a group, but he knows the Astartes beneath him preen at your every query.

It's complete lunacy.

It's heresy.

You must have somehow beguiled them all, just like you've done him.

But you're still right there—right where he wants you.

And damn it all, does he want you.

He wants—he wants you on your front, squirming underneath him. No, wait, he wants to see you—but then you'd need to be on top. He can watch, like that. Then afterwards he'll have you on your back, perhaps. Why not sideways? You're already like that, now. Or—or... who's he kidding, he'd take anything, and everything.

Throne, he's so hard he swears he is going to have a brain haemorrhage. He feels like he's already had one, honestly, for all his thoughts are hazing. It's a million leagues worse than the time you'd accidentally called him 'Lord Sicarius' by accident instead of your usual choice of 'Commander' and Throne, he'd rubbed himself raw after that.

Maybe if you weren't such a whorish little wretch, his fantasies wouldn't be running so rabid right now.

You wriggle and your half-covered back slides up against his front.

Cato's never held himself stiller in his life.

Your skin feels like fine silk to his spiralling mind; and even worse, your damnable wriggling doesn't stop. You start making little movements with your feet to try to get circulation back in them—and again, there's a fey similarity to your behaviours and some soaked rodent he recognises.

Decidedly, you've realised it's not enough and promptly jut your feet backwards between his quads. Still continuing the motions, but more furiously.

The touch is dangerously close to the cradle of his inner thighs.

He swears he actually feels the blood drain from his face in mortification. The touch is meagre, but it's real. It's more warming than any he's ever known. And of course, to add insult to injury, that blood drains straight to were he's already painfully hard—which is currently pushed against his navel, halfway jutting out of his bodyglove's zipper.

Thankfully, you withdraw yourself from between his legs and sigh again, snug.

Then, you shuffle closer.

Your rear scuds right up to the swell of his confined cock.

Cato's immediately beside himself in an instant, flying into a rainbow of emotion. First, he's disgusted. Then he's seething at the audacity—which makes him furious—and finally, he's... he's ecstatic.

He groans, raring like some rutting animal; but the sound ultimately leaves him as an angry, subvocal snarl of transhuman harmonics.

You flinch, and wriggle away sharply, and he repeats the sound again at the loss of contact. You're only a hair away from being there still, he can feel how close you are—but you remain just beyond him again.

"My—my apologies, Commander... I-I—" you blurt out, voice still a little chill stuttered, "I didn't... I didn't mean to overstep."

He inhales steadily. He notes you're doused in human stress hormones; but he's acutely aware of a honeyed smell just below the surface. It's so suffocatingly sugary it's actually hurting his nose to scent the air. It's addling his thoughts, turning his focus to mist.

He can smell you failing to juggle all the reactions and thankfully rottenly settling for the one that makes you reek of mollasses.

"Come back, shut up," he hisses. "And stay still."

Sweet-stink radiates again before you swallow sharply.

There's an eternal breath of time in which he's about to go mad with anticipation, and the instant you're slotted against him again.

Some base urgency sends him frotting forward, and the thick, leaking head of him that peaks out the top of his zip brushes against a warm cunt; all thanks to that blanket of yours having slipped loose slightly, and lo, the blessed horrid consequence.

He'd live off the way your surprised gasp makes his nerves thrill.

"Is—" you wheeze, "Is that...?"

He grimaces, unsurprised you're ever stupider than you look. Recklessly, instead of lying—instead of saying 'no, it's a combat knife,' his mouth decides he's to act the most pathologically honest town crier alive.

"It," he intones sharply, before the words "...is your fault," leave him as a rushed hiss.

A belated pause wins out for a moment, and he's mortified as he realises what he's just confessed. There's a leaden feeling at the back of his throat. One option to recover the situation is that he could just hit you on the head. What'd be a shiner of a punch to a brother would be a terminal concussion to a baseline. Then, he'd tell the Primarch, oh yes, you died. Very sad. How? To shreds. To shreds you say? Truthfully, he can't really bring any actual conviction to the plan. He wouldn't. The notion is merely a hypothetical, in a perfect world where violence solved everything. Because if you die, Guilliman will send him to an Agri-world to be some peasant's plough-puller or someshit for a few centuries—and Cato's going to kill himself before he has to suffer that indignity. Uriel would never let him live it down. He's bound to suffer the same consequences, ultimately. Even if he's got no idea what an Astartes with a sex drive would be liable to be punished for. Oh, right. Corruption. So now, there's a credible witness to his flaw and one that his Father'll believe, worst of all, and... abruptly, you reply instead of scream in revulsion, your voice a mumbled little squeak as you say, "I didn't know—I mean, I didn't think—"

"Believe me, I am well aware you lack the capacity to think," Cato cuts in, and swallows down a snort at his own mean spirited joke. He's fucked, and for some reason he's suddenly further struck by the hilarity of the bastard, warp-spawn wiles of fate and chance. May as well be hung for the sheep as for a lamb, he decides.

Your breathing gains a shallow edge, and he feels you make as if to inch away again.

"I said not to move," He growls, and keeps you flush against him—holding you there by way of folding an arm across you.

"I just... uh," you reply, "I'm just..."

Your ass grinds back against him.

There's contact, your skin against the flushed, drooling head of him that feels painfully tender—and then you ruin it by speaking again.

"Curious, I suppose...? I was of the belief the Adeptus Astartes didn't..." your voice is soft, at least; slow and distracted, "Have an appetite for... this sort of thing?"

Cato momentarily stays fixated on the breathiness of your tone, and has to remind himself he's supposed to be angry at being robbed of silence—so he grumbles, "I told you to shut your trap," and promptly smothers a palm over your mouth.

You make a noise that sounds vaguely like a mumbled curse and settle, breathing hard through your nose to compensate.

Still, your rear presses back against him.

Cato takes the gesture at face value and fusses, roughly wrenching his bodyglove down to his thighs with his free hand.

Unconfined, his cock slaps the small of your back, and he manhandles you to readjust so it glides between your thighs instead.

Everything in place, he skews his hips forward, and his eyes roll back at the smooth, sublime drag of skin against skin. It's genuine perfection, wet and soft and molten.

The little hitched breaths you steal through your nose with each roll of his hips make him grind faster. Pressing closer with each, until the abhorrent, sticky sound of him steadily fucking against you is nigh deafening.

"I go in or I stay out," he says, and he can feel his molars grate against each other as he adds, "...or I can stop."

You shake your head furiously, or at least as much as the huge mitt on your chin, maw and jaw allows.

"Then decide," he snaps. "In?"

Cato hears the cartilage in your gullet move as you swallow dryly and nod.

Chuffed with your allowance compliance, he hums—and then it's his turn to hesitate.

When he draws his hand from your mouth, he curtly says, "Stay silent," and starts as if to tell you to arrange one way, then decides against it; dithering uncharacteristically. Then, rarer yet, Cato stumbles his words as he adds, "Move on to y-your front, then."

He doesn't know why he asked for the least preferred option when he'd been deliberating over the hypothetical for so long previously but nonetheless you, miraculously, comply without complaint. And despite himself he frustrates as you roll, his cock slipping away from between your thighs.

Draped in covers, he can't see much of you aside from the shape of you slowly arranging onto your hands and knees; before your chest sinks, and your ass stays up.

Like a rabid dog, he scrambles onto his haunches and scuds over behind you.

He's not entirely sure what to do first, and harrumphs.

In answer, your back arches even further in a dangerously luring bow, a display of willingness whorishness that turns Cato's thoughts to mush. Ass up and still in the pile, covered in blankets and rags, it's painfully easy to tug you from them just enough so that a decent portion of your raised lower half is exposed to him.

All he's able to comprehend the very next instant in some hind-brain, primitive way is a shapely ass, and a pretty pink cunt.

He grabs your hip, and the size comparison is so stark his head swims. With the span of one hand, he could palm a whole globe of your rear.

He does just that, and spreads you to take a nice long look.

You've a glossy sheen of clear slick that's starting to string down where it's collecting between your labia, and Throne—it's that. That's the sweet smell. And it's all for him—you're everything he's wanted.

Inspecting, he finds the hole leaking lubricant and a much, much smaller one below it—the vagina and then the urethra, he reasons by way of thinking back on a baseline biologis graphics; and, eyeing lower to a hooded fold, he finds a swollen little nub.

Pointedly, he's got a suspicion of what it is and turns his curiosity to it.

It's an easy target for his large thumb, even as slippery as your lust has made you, and—

A shaky little keen, then your knees pull together; body curling.

"Keep your damn legs apart," he grunts, wrenching them wide, and splaying a big palm on your ass to lift you into an arch again.

He's tempted to just bask in the glory of it all, grope, smack, lick—make you beg for it until he's sure you know he's in charge. Until you're as high strung for him as he's ever been for you. But he's frenzied, and well beyond being able to linger on those broader wants; not when he's got an Ambassador to fill.

He's aware of what your clit's really for now, and keeps rolling the pad of his thumb over it until you're squirming. It doesn't take long until your hole is visibly twitching. Nothing but a sloppy, wet mess of your own whorish excitement for him, as you ought to be. Cato bites back a longing sigh as he gets the delight of watching a fresh rivulet of slick string down your thigh.

And when he works up the gall, he jams that same thumb to the hilt in your cunt.

Your insides squeeze around it, and you start shaking, then. But it's not from the cold. No, anything but that. You're warm now, and he's deliriously happy to find you're as soft inside as the rest of you looks and feels. Warp damn him, he's no better than some slavering genestealer wretch fiending for its pound of flesh.

Your smaller baseline frame makes every part of him look huge in comparison. Even his thumb is big. And you're so much less—and the fact the disparity is so glaringly obvious plays havoc with his brain; but he's got an idea. An idea that he refuses to acknowledge sounding painfully like a boarding action to him.

With little tact, he sidles up and positions himself so his tip slots right against you, while stretching your opening with his thumb.

Lining himself up with his other hand, he nudges your entrance, smearing precum in with your wetness while inching forward; sliding his thumb out in tandem with pushing his cock in—and his efforts succeed.

Cato's transfixed watching the head of himself fill the gap, sliding in—and you let out a muffled yelp, still half-buried in the blankets like some stuck animal; your thighs juddering as you suck in air.

Honestly, he's glad you've smothered yourself like that, because he can't imagine keeping it together if you were actively watching him. He thinks the stark reality of it would have him run right out of the shack. Even the idea of having your pretty damning eyes on him makes him swoon sick.

With an over-eager roll of his hips, a shiver races up his spine. But he earns a cry from you.

He takes a deep breath.

There's a twinge of pain-smell and the vaguest hint of blood in the air, but it's impermanent compared to the amount of lust.

He pushes a little more, and you ripple internally around him; making a racketing, breathless noise—twitching before slacking, and then twitching again. A few perfect little moans escaping you at last.

Abruptly, all he's able to give a fuck about is the sensation of wet and hot, and how you're finally all his—it's a strangling fit, but it's satisfying a craving bone-deep. Infinitely better than his war calloused hands.

You feel sublime, and it's pure bliss finally getting what he's wanted for so very long.

All those rest cycles wasted furiously humping into his own clenched hand, all those hours of torment seething about your latest unintended slight against him.

He's so dazed by the new sensation he's massaging small circles with his fingers on your flank, humming lowly. Who would have known all he really needed was to hilt in a warm, velvety, absolutely sopping wet cunt to come around to you? Maybe you're not so bad afterall. That is, for an insufferable little cock-sleeve; but it's nothing Cato can't grin and bare. He can almost imagine tolerating further babysitting assignments, if it means he can use you as a hole to ram his frustrations into like this.

He continues petting you, absentmindedly.

But the involuntary mercy didn't stop you from jackknifing when he bucks in more—each little motion seating him deeper and deeper. He's stunned he fits. You're so... small, and Throne, he feels monstrous even fixating upon the disparity; nevermind the shiver that races up his spine at the thought.

He yanks you backward and you stop squirming for a moment.

When your wriggling starts up again, he holds you still with the sheer willpower only a neurotic control-freak could muster. He stops your motion, yes—but your insides also stop shivering around his cock and he's resentful of that.

Nonetheless, you make to move again then, keening and bothering him; but you're seemingly struck daft when he bottoms out at last, hitting your cervix. Your internal muscles tense on the intrusion, practically cramping around him, blinding him with ecstasy for a heartbeat as you clench down hard; and a squeak of surprise escapes you. Your legs lock stiff for a moment, air venting out your lungs in shock.

You garble out a sweet, hoarse curse that sounds more like a sob than anything.

Cato supposes the theatrics are what an orgasm on something his size does to a woman. And he finds he's appallingly keen to see and hear you do it again. Keen to feel it, too. He adjusts himself and grinds, making sure you're getting every bit he's got to give. It's no small feat of restraint from Cato to not simply drive into you with all his might like a hydraulic press.

Maybe that'll make your tight little hole cinch up again? He thinks you'd like that. No—no, you should be begging for him to keep fucking you. You should be thanking him while you're at it too, really. Thanking him for deigning to take you to begin with.

Your arch falls away to a prone slump with a whine, thighs trembling, leaving him straining forward to stay in you.

He is irate at your antics, now; and his retaliation betrays it.

Cato seizes your hips and yanks you back up his cock, shimmying you a little so he's nice and sheathed and stuffing you full, nigh folded under him. Warm cunt stretched taut around the base of his thick cock, like a perfect scabbard.

He's suddenly absorbed in watching your covered form consciously trying to counter the overwhelming forward mass of him starting to drive into you like he was part battering-ram.

"Better than all those limp-dicked, bastard lordlings you've let empty in you to even chance a cushion near my Primarch's table, hm?" His tone is little more than a scathing drawl, pulling almost entirely out of you just to dip the head of himself in.

You moan into the fabric smothering you, and he holds you with a controlled desperation.

"Answer me, you little shit."

He watches you nodding desperately beneath the cover a second later, failing to get an actual reply out around your huffing and puffing.

Cato groans, "Far keener for Astartes cock, aren't you?"

You nod again, needy.

"Throne, you're pathetic," he chides harshly, delighting in the soft whine of protest you make when pulls out to the tip one last time. "All that haughty bullshit, just to turn out to be so—so easy," then he's sliding back to the hilt and starting his rutting anew, grinding into that perfect spot that has your insides shiver around him again and again. "Isn't that right? This is all you're really good for?"

Beneath him, you're too much of an insensible mess to even think about answering; and somewhere in that depraved miasma of sound, he swears you're trying to say his name.

So, understandably, he inches forward on his knees and boxes you under him. Pinning you under the span of his bulk, two big hands firmly planted either side of your blanketed head.

He can see a few strands of your hair sticking out from beneath it and he can see the fog of your breath and the tip of your nose through a tented section, and only one of your hands—clawing out at the scraps of fabric.

"Prick-dumb animal," he sneers, flagrantly showboating; trying to sound as if he's not feigning lucidity and completely at the mercy of his lust.

He drops from his hands to rest on his elbows, manoeuvring a forearm under your head to prop your chin up. He's so bent over you that your ass is practically glued to his massive pelvis.

You can't stifle yourself now.

The sounds you make when he starts ploughing into you again are unrestrained and absolutely debauched. Practically music to his ears. He can feel your saliva smearing across his arm, and he's absolutely stupefied at the mantra of 'Sicarius, S-Sicarius, Sica-ah—rius—' you start panting. To say nothing of the keening whimpers that escape when you're not crying out for him. Louder with each thrust, and warp damn it all—his perfect memory is never going to let those gorgeous sounds go. He's going to fiend off you mewling his surname like a full dose of battle-chems until he fucking dies.

Cato groans and delights in the involuntary squeeze you make around his cock again; your hips skewing up into his own, meeting him.

He just wants one more thing—he wants—no, needs—he needs to hear you scream his name in that reedy voice. Telling him that you like him playing guard for you, and you're all his and you love hi—

Rather abruptly however, you're cinching down on his cock as you come again. Throne, your cunt may as well be Marneus' clenched powerfist the way you're wringing him for everything he's got. Crying out like you're inconsolable, and so painfully eager and—oh, fuck. He tries to hold off, but it's of little use. The dam cracks, and it's all too much for him far too quickly.

"You rotten w-whore—" the words leave him in between ragged, staggered pants, gritting his teeth even though it's achieving absolutely nothing. "Stop s-squeezing, I-I—"

He's finishing in you the next second and letting out a rough, unbecoming moan instead of the rest of his sentence; despite trying to muffle himself against your shoulder and save face. Emptying all his pent up spend as deep as he can inside you and rutting himself deliriously into oversensitivity. The simple feeling of it is a more profound experience than he can even begin to explain—and he's rendered daft. Fighting just to stay awake against the warm, coddling bliss running rife in his nerves as his muscles twitch.

Still trying to recuperate, he's drunk with afterglow for a few seconds. Head beside yours, sharing the same air and hurried breaths.

In his stupor, he notes that your hair smells nice even after everything. And he tuts softly, resting his eyes. Lulled by the soft sound of your hyperventilating evening out and the continuous, weak fluttering of your cunt around him, hot and tight, and still a perfect fit.

He almost understands why mortal men so frequently fought over baseline women, now.

Almost.

Because then you start squirming again.

Pointedly, he opens his eyes and begrudgingly lifts himself away, slipping free and leaving a big sloppy smear of combined fluids across your ass and thighs as he settles into a kneel.

You're still presenting yourself as Cato scrubs a palm across his face, and blinks slowly.

He glances down for a moment and swallows.

He's hard—still.

Just as ready to rut as he was to start with, despite the fact he's only just finished.

And, much like a beast in season, he genuinely contemplates another round—what would be the harm, anyways? He could be sliding himself back into you, right then, and he doubted you'd do anything but buck up to meet him. So much for some diplomatic prodigy. You're little more than a mewling wreck. And what better way to prove it than another wet layer of your mixed fluids on his cock?

A soft sound escapes you abruptly and he looks back to the place he's itching to slam back inside of.

A few fat rivulets of his cum drip out your abused entrance, but you're too well-screwed to even care, it seems.

He thumbs one of your folds aside and smiles smugly at the mess.

You poor thing, it must be so humbling to be put in your place. He hopes it felt good. Having your better's cum leaking out of you like a banner on a conquered fortress.

He's tempted to stuff his spend back into you and give you another load to drip. Let it leak down your thighs as you pad past his men on the flagship, that'd make them well aware of who you really admire—

At that brilliant jarring thought, blazing post-clarity arrived; an abrupt and unsettling feeling. The fact he'd even—even dignified your almost Slaneeshi-tier temptation—the fact he's raring to go again—he must already reek of your lust, and you of his—and Emperor have mercy, one quick scenting betrays everything, his men would tell their Father, and—you—you groan and worm yourself back under the blanket, likely truly feeling the chill now without his body to warm you.

The urge to say something becomes almost suffocating all at once, and Cato opens his mouth—just to be interrupted by a beep.

Hesitation seizes him, and he eyes his pile of half-frozen attire in the far corner.

Eighteen and a half seconds pass and it beeps again, indicating a second for every minute of arrival estimation.

The tracker beacon has finally done it's job.

But the matter of hastily cleaning up what insanity just happened becomes the real concern now.

Suddenly stuffed to the brim with adrenaline, Cato gets to his feet with Astartesian speed. He tries to take a step but sways, almost toppling. Looking down, he realises himself; and gingerly stoically waddles marches away from you, his bodysuit stuck around his knees. There's a cupboard in the other corner, covered in a frosted cobweb that looks a little like gossamer. Rifling through it provides him little. Most of it's contents are iced through, but a bottle of what stinks like absinthe is good enough, and he doesn't think it matters what he cleans up with. He definitely does doesn't look like a servitor on broken wheels as he scuds on his heels back beside your pile. And if he suffers any more injuries to his ego, they definitely don't include him bungling a kneel and being forced to wobble down on to his haunches. It's not his fault he's mentally accommodating for power armour that, currently, isn't there.

Pausing, he pokes the mound of scraps you're under, trying to rouse you.

When your answer to his 'kinder' effort results in you whining and curling up tighter, he settles for tossing any mercy out the window with a petulant grunt; and identifies the shape of one of your legs and tugs you half-free by your ankle like a speared fish, earning a yelp as the cold assaults you.

Grabbing one of the loose rags in your pile, he saturates it with spirit and scoops you up under the hips, before starting to wipe away the evidence.

You begin thrashing almost immediately when the rag makes contact. Then you're practically yowling, "It hurts, it h-hurts—wait, wait—" and okay—yes, maybe using high proof alcohol to clean the smell and slime of his cum off your freshly fucked hole wasn't his best idea. In his defence, you're one of the most stubborn baselines he's ever met, and you should learn to handle a little pain. Secondly, booze is the only thing that stays liquid at freezing.

"Enough with the bloody caterwauling, woman," he barks, effortlessly holding you steady despite your struggling. "It's not that bad, toughen the fuck up."

When he's done with you, he's actually remorseful of the situation. Certainly not his finest choice. Because now you're sniffling weakly, fussing about the residual stinging; and then you promptly scramble back under the blanket.

"There was nothing else I could use, okay?" He says sourly, scowling at the bundle of fabric you disappear into; before tossing the soiled rag he'd used to clean you into the fireplace to ignite.

He grabs another from the pile and douses it, wiping himself off—and at last, he's finally able to start to pull his bodyglove up over his hips. Wiggling and straining to fit the thick, skin-tight material over his still very much erect cock.

From the edge of his vision he can see you've peaked your head out to watch as he fixes the sternum latch in place.

He gives you a cursory glance, but nothing more.

He ultimately expects you to look away like the mouse you are—but no, what actually happens is worse. You just keep silently raking him with an expression that makes him feel like he's made of glass and every secret he's ever had or ever known is laid bare.

He can't stand it.

It makes Cato want to sneer at you fiercely in the hopes it would scare you off, remind you he's an exemplar of the Adeptus Astartes and shouldn't be stared at—something, anything except that look.

"Get up," he turns sharply and snorts.

The beeping is once every two and a half seconds, now.

Two and a half minutes, then.

"You let me fuck you," he bites out.

You're sitting now. Covered in one of the larger articles of rags. A tartan, fraying thing crumpled atop you, frowning and looking dejected. Then you open your mouth to speak but promptly stop. He can tell you're trying to form a diplomatic reply, and he grumbles, fuming.

"Tell anyone of this—" Cato's well aware he's being cruel as he adds, "—and I'll wring your little neck, Father's favourite pet or not."

You finally look away.

And he finds he can't stand that either.

So, to souse his bruised ego, Cato decides he's going to burn the shack down as soon as the transport lands and you're onboard.

He also decides he's going to burn that tacky formal tunic of his too, simply because he can.

#warhammer 40k x reader #space marine x reader #cato sicarius #warhammer fanfic #ultramarines #reader insert #cato sicarius x reader #warhammer 40k #my bad everyone i got lost in the sauce this long af #writing

209 notes · View notes