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rinamars · 5 months ago

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(under the cut: 2k of grinding, rough sexytimes, the obvious power imbalance that comes with fucking your superior, a slight hint of exhibitionism, an even slighter hint of breeding kink because it's me, what did you expect. basically my fantasy of letting this man use me)

You need to keep quiet when you slip into the Commander’s office late at night. You need to keep quiet, because everyone in the Scouts knows that their Commander is a massive workaholic; they know they’ll be able to find him there, sitting on his chair, surrounded by piles of that damn paperwork.

Sometimes, the younger recruits—bless their soul—knock on his door to bring him tea or something to eat, anything that might make his all-nighters a bit more bearable.

Little do they know that he already has you for that.

It started innocently enough. It started, in fact, with you bringing him tea, just like those other recruits did.

At first, all you did was simply place the small tray on his desk, salute him with trembling hands, and leave, content with just that small nod of gratitude you received in return, because at least he’d noticed you.

Then, you overheard Section Commander Hange mention that the Commander had a sweet tooth, therefore you made sure to always include a crumpet, or a biscuit, or even simply an extra sugar cube; that’s when his nod of gratitude turned into a genuine smile, and you had to be quick to turn around after all, so that he would not see the red blossoming on your cheeks.

When he suggested you bring a second teacup, you felt like you were walking on clouds. Soon enough, you went from lingering in his office long enough to empty your cup to spending hours just chatting about nothing and everything. Hours that made you ache for him even more, as you returned to your bunk afterwards and clamped a hand over your mouth as the other slid underneath your already soaked panties, aided by the memory of his blue eyes, his plump lips smiling at you, his deep voice, massive hands—

Long story shorts, you were down bad.

You always wondered what went through his head as you spent your nights like that, talking and laughing together like old friends. You wondered if he was just as desperate as you, if the way he looked at you sometimes meant that he touched himself every night to thoughts of you, that he too had to will himself not to scream your name as he came in his hand.

You wondered—until one of those nights you did not have to wonder anymore.

The teacups were already empty. Silence engulfed the headquarters; everyone seemed to be asleep but the two of you. He’d been observing you and smiling to himself more than usual, and all that extra attention had gotten so overwhelming that you had to stand up and walk to the open window, hoping that the fresh night air would erase the desperate blush from your heated cheeks.

You gripped the windowsill and took deep breaths, and then, just as you were about to turn around, ready to act like nothing was wrong, you felt his presence behind you.

“No need to be shy,” he said with that low, sexy voice of his. “Let me see you. You look so lovely when you blush for me.”

“Sir—”

You didn’t mean to whimper, but you were far too desperate to act innocent, anyway.

He settled behind you, his hands firmly holding onto the windowsill on either side of you—his hips pressing into your ass. Far too intensely for it to be an accident.

The sound you let out this time was far louder.

“So I was right,” he spoke into your ear, his lips ghosting over the earlobe. “This is what you have in mind, when you come into my office after hours.”

Erwin’s hips ground into you more intentionally than before, and his erection was unmistakable. You let out a needy moan, instinctively grinding back against him.

“And here I was, thinking you were so kindly offering me tea… when all this time, what you were offering—” another grind, another embarrassing moan— ��was yourself.”

The rest of that first night is a blur. You remember his hard cock humping you from behind, almost making you soil your underwear right then and there; you remember him pushing you down until you were on your knees, the sound of him unbuckling and unbuttoning his pants, the way your throat suddenly felt dry at the realization that fuck, he’s big. You remember him guiding your head while you blew him and the shameful wet noises your mouth made, you remember how generous he was with his praise—yes, just like that, good girl, so eager to have a taste—and you remember the warmth of his seed as it filled your mouth.

It was a silent pact, but you became his little stress relief, a duty which you fulfilled thoroughly every single night.

When you returned the following night, the tea tray was just a silly prop; no one was thirsty for tea anyway. The water cooled in the teapot as you bounced on his lap, the sound of skin slapping on wet skin almost as loud as your whimpers.

Sometimes you even forgot to actually fill the teapot, such was your eagerness to offer your body to him, but at least you were smart enough to keep the act of pretending you were visiting him so late at night for something as innocent as tea, just in case anyone ran into you while you were on your way.

It’s like you were made to serve him. You felt naturally inclined to obey his every order, behind closed doors just like on the field. Get into formation. Switch to ODM gear. Spread your legs. Making sure expeditions went smoothly and he had a hole to fuck every night was simply what any good soldier would do for their Commander; and so, you obeyed.

“Maybe this is your purpose after all,” he murmurs, tapping his cock against your awaiting tongue. “Kneeling for me, eager to please.” You try to fully wrap your lips around him, and he chuckles, pushing your head back with one hand. “Oh, you’re impatient, aren’t you? Can’t wait to have your mouth full, hmm?”

After some teasing, he finally feeds you his cock, and you moan in relief at the now familiar taste. He’s so large he stretches your mouth to full capacity, but it’s not like you’ll ever let that stop you.

He groans—your favourite sound. “Deeper, just like that… oh, yes, you were made for this, darling, you were made to take my cock…”

The praise makes you moan around him, and he grips your hair tighter, keeping you still as he fucks your mouth. You focus on the wet sounds that fill the room to distract yourself from the soreness of your throat. One trembling hand fondles his balls, and they feel heavy underneath your touch.

“Yes, fuck,” he lets out, and oh, hearing him curse like that does things to you. “That’s my good girl.”

Your jaw hurts, your throat burns, and tears are streaming down your cheeks from the exertion, but his praise makes you moan around his cock and bob your head faster. He’s hitting the back of your throat with each thrust, and he’s barely halfway in.

“Oh,” he grunts, and your mouth is suddenly empty. “Stand up,” he orders, “I have to be inside you.”

He’s quick to position you with your back against his desk and lift your skirt up. After your first few escapades, you started showing up to his office in your civilian clothes, not only because you feel more alluring in your long skirts and soft blouses, but also because lifting up a skirt is so much quicker than having to detangle your legs from your uniform trousers. As the Commander works your panties down your legs, you think maybe next time you should forego those as well, make it even easier for him.

You let out another desperate moan as he runs the tip of his cock up and down your pussy, and you’re so wet the motion produces a clicking, squelching sound that drives you wild, drives him wild, too.

“A cock in your mouth is all it takes for you to get this soaked, hmm?” he whispers, his eyes twinkling in the dim lighting of the room—the candles are beginning to turn into embers. “Does it turn you on, offering me your body like this?” He slides the tip in before moving back again despite your protests. “Letting me use you like this?”

“Yes,” you finally manage to utter. “Yes, Commander.”

“My perfect little soldier,” he praises you again before finally breaching you.

If heaven really exists, you reach it every time he sinks balls deep inside you.

He doesn’t dawdle, it’s fast and rough from the very start. His balls slapping against your ass with each thrust are loud, just like you are.

“Oh—Commander! Mmh—”

“Shh, darling,” he whispers in your ear as he keeps the ruthless pace. “You don’t want people to hear, do you?”

“Ahhh—”

“You perfect, lovely thing.” He’s fondling your breasts. “You insatiable little slut.”

Yes, yes, yes. That’s what you were meant to be, that’s what the Universe made you join the Scouts for. You were made to keep his cock warm, his balls empty as his mind relaxed, and you were eternally grateful for that role. He fucks you, and you squeeze your pelvic muscles, making sure you’re nice and tight for him, fulfilling your duty.

“So tight, so fucking tight,” he growls through gritted teeth, gripping your hips so tight you’re already savouring the inevitable marks. “Taking me so deep. Here,” he says, grabbing one of your trembling hands and pressing it against your tummy, and—oh. He was bulging you with every thrust. “Feel how deep I am inside you, darling?”

“S’deep,” you echo, too dumbed out to form coherent sentences.

“Yes, baby,” he chuckles, “so deep.”

"I—ahh—mmm—"

“What is it, darling?” he mocks you. “Cat got your tongue? I’m fucking you so good you forgot how to speak, huh?”

“Please—”

“Ah, there she is. Please what, hmm?”

“Oh, more, please—”

“What a good girl, asking so nicely.”

His pace gets impossibly faster. Sweat and various bodily fluids make your bodies stick together, and it would disgust you if it didn’t feel so damn good.

His hips suddenly still as warmth fills you up, and you simply cannot hold back anymore.

You’re pretty sure you passed out for a few seconds, but when you open your eyes again, he’s rocking back and forth into you again. Overstimulated, you whine.

“One more,” he commands. “You can take one more, hmm? Like a good girl. Keep your legs nice and spread—yes, like that—”

He’s panting above you, his movements are getting erratic, but he seems determined to chase that high once more.

“One more,” he repeats frantically as his seed floods your insides once more. “Oh, yes…”

Your skirt is crumpled and stained with sweat and both of your releases, a few buttons are missing from your blouse, and your panties are nowhere to be found.

As for the Commander, well, he never looks anything but his best, not even after such strenuous activity; only the way the pomade had worn off from the pearls of sweat in his hair seems to ruin that perfect image.

He grabs your chin and forces you to look into his eyes. There’s sudden clarity in them now: nothing like a good orgasm to sharpen the mind. He kisses you hard, and you’re too exhausted to do anything but let him lead.

“What do we say?” he whispers afterwards, lips still brushing yours.

“Thank you, Commander,” you let out, still catching your breath. “Thank you.”

“Good girl.” You whimper as two of his fingers plug you up, preventing his seed from spilling out. “Be careful, now, pet. Do not waste a drop.”

#reposting bc i deleted it by accident whoops #mars writes #erwin smith x reader #erwin x reader #erwin smith smut

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