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jamesbuchananxsteviegrant · 3 years ago

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Even When She Had Noone | Brother!Bucky x Sister!Reader (Smut, mild Angst, mild Fluff)

Category: Smut, mild Angst, mild Fluff (Mandatory) Age: 18+ Trigger Warnings: Incest, sex pollen, dub-con, dirty talk, oral (m receiving), intercourse Ship: Brother!Bucky x Sister!Reader Summary: It was a simple in-and-out mission, but she ingests something that might kill her, the cure being something a little more than simple Request: N/A Contains Spoilers for: N/A Word Count: 6.3k

This work is absolutely fictional and I am not gonna tolerate hate on it. If you're not interested then just don't read. <3

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Even when she had no-one, she had Bucky.

And even when he had no-one, he had (Y/N).

Even when the whole Universe was against them, they still had each other.

HYDRA didn’t even separate them. They were too powerful together to do that.

Let alone the fact that Bucky would kill anyone who dared try to take his little sister away from him.

Skip to modern-day. Nothing is different. Not really.

They’re still inseparable, but they’re now trying to save the Universe instead of trying to destroy it for the likes of HYDRA.

“How’s it looking, baby doll?” Bucky asks down the comms as he continues his path down the South of the building they’re infiltrating.

“Full of people trying to piss me the fuck off.” (Y/N)’s sarcastic tone prompts the soldier to chuckle as he shoots the enemies in his way.

“Language, sweetheart.”

“You trying to push my buttons or what, Barnes?”

He simply grins and shakes his head, continuing to head toward the vault that he and his sister are hoping to remove a number of substances from.

“Nice hair.” The soldier comments as they meet up in the centre of the huge building. She reckons it’s an old hospital.

“James, do you want me to kill you or what? You could’ve just asked if you were that desperate.” (Y/N) asks, quirking a brow as she sets up some small bombs on the lock of the vault door.

“Mm, perhaps another time, we’re a bit busy right now, no?”

Another roll of her eyes.

This is the usual banter between the two siblings who have been through more than enough together.

“Keep an eye out whilst I sort out these vials, will you?” She asks as they get through, (Y/N) mentally counting up how many there are, some holding a pale blue liquid, others a dark green, a couple with more of a pinkish tinge.

“Yes, ma’am.” He mock-salutes before scouting the hallways around the huge metal box in the wall.

“Good boy.”

The briefcase she has to hold the vials is already heavy, so she’s not looking forward to when it’s full. With quick, nimble fingers, (Y/N) quickly kneels down and migrates the glass tubes into the sponge-insulated case, occasionally glancing toward the door when she hears gunfire.

“You still alive, Buck?”

“Unfortunately for you, sugar.”

She breathes out a laugh at her brother’s humour before continuing to grab the last few dozen.

She’s not entirely sure how she didn’t notice the sneaky bastard walk up behind her but she’s fast-acting nonetheless.

The man yanks on her ponytail which prompts her grunt before she’s grabbing her knife from her thigh holster and reaching behind her, the blade piercing straight through the side of the man’s leg. Another hesitation from him for her to pull back from his hold and jump to her feet, spinning around and spinning the blade between her fingers.

“You little bitch.”

“Say it again: turns me on.” She remarks, smirking and quirking a brow.

She doesn’t expect the man’s own expression to contort into an entertained grin at the sarcastic response.

He quickly darts forward, shoving her backwards against the metal shelving that holds some more of the vials she’s yet to pack up and take away. They rattle, the sound of small amounts of glass shattering heard from above her, a few of the tubes breaking, making the woman’s brows furrow.

“Can you not damage the goods I’m trying to neatly organise?”

He continues to grin, going to grab the weapon in her hand but she dodges, but he has her wrist pinned against the shelving behind her so it’s useless to try and use it.

“You wanna be turned on? Catch.” She’s confused at his singular word, but with one hand now binding her wrists behind her, he uses the other to force her head backwards.

“What the fuc-”

The liquid drips onto her face from a shelf above. It’s cold. Almost burns but not much.

“Get the hell off me!”

It drips down her cheek and onto her mouth, the small, trickling waterfall of whatever the hell was in the broken vial now pungent on her lips.

The scent is intoxicating. It’s gross, really. Smells like the perfume her grandmother used to cover herself in.

(Y/N)’s legs are kicking up a storm in an attempt to get free from the man but he’s clearly experienced.

“Open that mouth and have a taste, I promise you’ll enjoy it.”

“You’re fucking disgusting.” She spits back but can’t help taste the liquid on her tongue.

“You think I am? Wait until you feel the effects of this nice little number. The boss's favourite. Romance pollen.”

“What the fuck are you going on about?”

He simply smirks and tightens his grip on her face. She winces slightly.

“You’re fucked, little girl.”

“Big talk for a man with no team left.”

The enemy’s head turns from (Y/N) to the new voice in the room, barely having time to react before Bucky pulls the trigger on his gun, watching the man stumble away from the woman and onto the floor.

“You okay?” The super soldier immediately asks, pacing over to his sister and checking her over for any injuries.

“Fine, he didn’t hurt me, just talked a load of shit about whatever the hell this is.” She responds, fingers reaching up to the liquid covering her face. “Tastes quite nice honestly.”

“Don’t fucking drink it, you idiot.” Bucky groans, rolling his eyes.

The woman giggles, having not actively consumed any of the unknown substance, however can taste it at the back of her throat.

“Yeah, yeah. Help me clean the rest of these up and we can go.”

“Yes, ma’am.”

They spend another twenty-five minutes in the building before they make it to the Jet. Only the two of them were sent out for the mission, it was barely a struggle, in and out job with barely fifty soldiers defending the vault.

“Hell, I’m shattered.” Bucky groans as they shut the Jet door, heading toward the front and turning on auto-pilot for the ride home.

“Second that. Might get Nat to give me one of her Godly massages when we’re home.”

“Ooh, there’s an idea.”

She sits the briefcase of vials down securely before using one of her bottles of water to quickly rinse her face of the substance sticking to it.

“I’m gonna nap, we got four hours left before we’re home.” Bucky states, removing most of his gear, leaving him in one of his tight gym shirts and work trousers.

“Sounds like a plan.”

The pair settle down on the two benches aligning each side at the back of the Jet, Bucky throwing his sister his hoodie to use as a pillow - or blanket.

“Thanks, Barnesicle.”

“Please stop calling me that.” The soldier groans as she laughs.

“I’ll think about it.”

The two head off to sleep, but it’s just short of an hour later when the woman wakes up again, brows furrowing.

“What the hell?” She breathes aloud to herself, feeling sweat coat all of her body, head throbbing - amongst other things.

Gulping, the woman sits up and grabs her water bottle, taking a swig, or five, hoping it’ll calm her hyperaware state.

“Friday, what’s going on with me?”

“You have a feverish temperature of forty-degrees Celsius, one-hundred-and-four Fahrenheit, your libido is more heightened than what it usually is. I have identified an unknown substance in your body, I am working on a diagnosis but am currently unsure.”

That fucking drug he let drop onto her face. What the hell was in it?

“Wanna be turned on? Catch.”

“Romance pollen.”

So, what? She’s ingested some type of viagra? Is that it? So she’s slightly horny, no biggy. Pretty sure Sam or Steve will be around to deal with that when she gets home.

God forbid Bucky ever found out about that little secret though.

With a quick splash of water on her face once again, the woman attempts to sleep once more.

Attempts being the keyword.

Fails is more like it.

She keeps trying nonetheless. Eyes closed. Thinking of anything to take her mind off of it. But it all circles back around.

Think of home. Movie nights with the team. Horror movies with Wanda screaming when there’s a jump scare. What was the last horror movie we watched? Ooh, the Conjuring. Sat next to Sam. He held me close so I wouldn’t be so nervous. He kept me distracted by resting his-

Oh. Fuck.

Not helping.

Okay. New thoughts.

Think of the olden times back in the forties. Think of Coney Island with Steve and Buck. Think of how it was nice to get closer with Steve. Which led to him fucking me against the side of the toilet block-

Okay. No. Stop.

A rustling from across the Jet makes the woman’s eyes widen as she looks at her brother who rolls over in his sleep.

Bucky.

There’s a thought to keep her grounded.

The man who’s been there for her no matter what. Through everything. Even when HYDRA was wiping her out, he stopped it. He saved her. Always did.

Even when she was a kid and caught the flu, he was always the one making her soup and nursing her back to full health.

She’s very lucky and very grateful to have the brother she has in her life, despite everything they’ve been through.

Perhaps scaring off any man that entered her life was a little bit too far though. She remembers her first kiss with a boy at a diner in town. Bucky had heard rumours through a friend of a friend and was storming there instantly.

The poor boy never spoke to (Y/N) again after that.

“Bucky, you can’t stop me seeing boys!”

“I can and I will. The only man you ever need in your life is me.”

It was so cliche but she commends her brother for it. He was right. The only man who tolerated her through all their hardships and never loved her any less because of them was Bucky.

The only man you ever need in your life is me.

The throbbing in the woman’s groin makes her eyes widen as she keeps her eyes on her brother’s resting figure.

“What the hell? Ew.” She mutters to herself as she lays on her back once more and stares at the ceiling of the Jet.

The seed of thought was planted now and it simply grew from there.

He’s always been everything any man could’ve been for her. Did everything she’d want any man to do for her.

Trained with her. Danced on the sofa with her to pop songs he didn’t even know. Listened to her story ideas. Drove her around town late at night when she was too scared to sleep. Cuddled her when she woke up from nightmares. Listened to her ramble on about some cute couple she saw in the local cafe. Took her on dinner dates when she wanted some fancy food. Sacrificed his choice on movie night for her. Bought her chocolate and green grapes when she was on her period and wanted to eat nothing else. Ran a bath for her ready for when she got back from a mission.

All of these things that she’d want any decent boyfriend to do for her. Why would she ever need a boyfriend when she has Bucky?

Oh, yeah, because Bucky can’t fuck her into oblivion.

Can he?

NO.

God, no, stop. Ew. Gross.

Is it gross?

There’s no doubt to anyone about whether or not the man’s attractive. I mean, just look at him. Everyone always ogles the man whenever he passes by, whether he’s dressed in his full suit, tux, gear or shirtless. He’s a walking piece of art.

He used to be a charmer with all the ladies back in the forties and she knew it full well. She had to witness as he swooped all the ladies off to dance, leaving her and Steve alone at the bar.

Steve and (Y/N) very rapidly figured out a way to occupy their own time. Not that Bucky ever knew. He’d go ape-shit crazy.

There’s a burning shock that runs through the woman’s body, a twitch and an uncontrollable moan pouring from her lips.

She slams her hand over her mouth with wide eyes, head darting to look at the man across the Jet once more.

Fuck.

He’s still asleep. Okay. That’s good.

His face looks so restful. It’s nice. Good to know he’s finally getting some peace.

His beard could feel so fucking good between-

“Oh my God.” (Y/N) sits up once more, staring aimlessly in front of her as she attempts to stop her thoughts.

The throbbing runs through her body again and it’s pulsating right where the need is. The craving. The desperation. The desire.

She stands up and even that makes her wobble on her feet, despite the jet moving smoothly through the skies.

She realises her lips are parted and her breathing is coming out in heavy pants, hands trembling and saliva building up rapidly.

“Fuck.”

“Agent (L/N), would you like me to turn on the alarms to wake up Sergeant Barnes? It appears you are severely unwell.”

“No. God, no.” Is all she manages, leaning against the two pilot chairs from behind, staring out the front windows at the clouds.

“That doesn’t sound wise, doll.” Her brother’s voice calls from behind her a few seconds later.

Shit.

Did his voice always sound so fucking sexy?

“What’s going on, Friday?”

“NO! No, Friday, don’t say anything.” (Y/N) yells, spinning around to look at her brother.

That’s a mistake.

Bucky’s furrowed brows immediately raise and his eyes widen entirely at the sight of his sister.

Sweaty, red-faced, parted lips, chest heaving for breath.

“(Y/N) what’s wrong?” He asks, quickly standing up but the woman holds her hand out, gesturing for him to remain still.

“Don’t… Don’t move.”

The brunet listens but his concerned expression remains.

“What’s going on, sweetheart? You’re kinda freaking me out here.”

She meets his gaze and feels her body throb with need once more.

“Fuck.” She manages to cover her moan with the curse but she’s still very aware that it sounded ridiculously filthy.

“Talk to me, (Y/N).”

Her head shakes and she can feel just how wobbly her legs are once again.

“I can’t.”

“Yes, you can. Talk to me, tell me what’s wrong.”

She remains silent besides her heavy breaths.

“Is it that liquid that fucker put on you? Are you having a bad reaction or something? Are you in pain?”

So many questions, Bucky. So many better ways to use that fucking mouth-

“Oh my God!” She screams at herself as she thinks the absolute filth about her own flesh and blood.

“Friday, tell me what’s going on now.”

She doesn’t have the energy to stop him.

“Agent (L/N) appears to have an unknown substance in her body which I’m attempting to diagnose, it’s currently causing symptoms including an increased temperature of forty-degrees Celsius, one-hundred-and-four degrees Fahrenheit, cramping, weakened bodily strength, and predominantly an enhanced libido.”

Bucky’s eyes widen at the latter fact, now noticing the way his sister is clenching her thighs together.

“Oh, sweetheart…”

“Don’t fucking-” The woman cuts herself off with another wave of throbbing desire. Another moan.

Her legs give way, collapsing to her knees.

“(Y/N)!” Bucky dives forward off of the bench he was sleeping on, dropping to his knees in front of the woman and grabbing her arms.

The touch is like the water to the burning fire going on inside her body. It feels so fucking good.

“Oh fuck.” Another moan.

Bucky tenses slightly at the sound.

“(Y/N), look at me, baby doll.”

The name has always been sweet and endearing but right now it’s like music to her ears.

She does and her brother can visibly see the want in her iris’.

“Oh, fuck,” He mumbles.

“Bucky-” It’s a whimper, her eyes tearing up and reaching out to grip onto him. Anything.

“I’m right here, sweetheart.” He offers, pulling his sister into his lap and holding her close. “I got you, (Y/N), I’m not going anywhere. Talk to me, where does it hurt?”

“Need it to stop, Buck. Hurts so bad.”

“I know, baby, I know, but you gotta tell me where. Let me help.”

He doesn’t know when he started to notice, she doesn’t know when she started doing it, but her hips are grinding on the man’s thighs, her breathing getting heavier and heavier.

“Hurts so bad, Buck; need it to stop. Please- fuck- make it stop.”

The man’s eyes are wide as he acknowledges his sister quite literally getting herself off on him.

“(Y/N), stop, think about what the hell you’re doing.” He attempts but doesn’t push her out of reach. She’s in pain, he won’t let her suffer alone.

“Bucky,” She whispers, their eyes meet once more, her own expression so fucking lust-blown.

“Jesus fucking Christ.”

What the hell is he even meant to do in situations like this?

Call Steve? Oh yeah, and ask what? Hey, pal, any advice for when my sister is trying to get herself off on me?

A noise that something between a moan and a scream rips from the woman’s mouth.

“Fuck, (Y/N),”

“Bucky, please, make it stop, it hurts so bad!” She’s sobbing. Her face is bright red and stained with tears that keep flowing.

“Princess, listen to me: I can’t do anything for you right now. We’ve gotta wait til we’re home-”

“Can’t wait, need to cum.”

The brunet’s eyes widen once again at the seriousness in his sibling’s expression.

“Please, James, I’m gonna die.”

He doesn’t know what struck him more, the use of his first name in such context or the fact that his sister just told him she’s going to die.

“I won’t let you die, (Y/N), don’t be stupid.”

“James,” She whimpers, crawling forward into his lap once more and pressing her forehead against his. “Please,”

“Please what, baby?” He whispers, questioning his willpower when she’s staring into his eyes with such wanton need.

“Please touch me.”

The man closes his eyes.

“I can’t do that, doll. You’ve gotta wait til we get home, I’m sure I can ask in a favour from Steve-”

“Steve isn’t you!”

Opening his eyes once more, he can see that she really is in pain.

“Sweetheart, please, I’m your brother.”

She fucking moans at the term.

“Yeah, you’re my big brother, only you can make me feel good. No other man can do anything for me. Don’t need anyone else.”

Jesus fucking Christ.

“Baby, I’m gonna go over here and you’re gonna try touch yourself to help the pain, alright? You think you can do that for me, (Y/N)?”

She nods her head and is yanking her clothes off immediately. The soldier widens his eyes and quickly turns away, searching through his rucksack in an attempt to find the earphones he thought he packed. Apparently he didn’t.

“Fucks sake.”

“Oh, fuck,” The woman behind him moans, his eyes widening but he doesn't look.

The sound of how fucking wet she is is enough to send the man’s head into overdrive.

This is so very fucking wrong.

“Fuck, James,” Another moan.

Is this really happening? Surely the Universe is playing some sick joke on him right now? Right?

“Oh, fuck, God, I’m gonna cum,”

The man closes his eyes and takes a deep breath, trying to focus on anything else. But her screams and moans aren’t helping him.

The sound of her orgasm crashes into him like nothing else.

“Bucky,” She sobs, his instincts prompting him to spin around in case she’s not okay.

She’s orgasmed now so she’ll be fine, right?

Wrong.

Her legs are spread, soaking wet pussy on full display, her fingers soaked, her mouth tasting herself.

“Fuck me, James.”

He locks eyes with her and he looks scared.

“(Y/N), I need you to think about what you’re saying. You’re not yourself, you’re under the influence of whatever the hell that bastard put on you.”

“I don’t care, James, I just need the pain to go away. Need my big brother to take care of me.” She’s whimpering, fingers sliding back down to the soaking hole.

“Baby girl, you know I’ll always take care of you but I can’t do this to you, sweetheart. I won’t.”

She sobs.

“It hurts so so bad.”

The man swears the pain that HYDRA put him through was nothing compared to this.

She begins crawling toward the man who’s now stood, his eyes cautiously watching her.

“Baby-”

“Shh, Bucky, let me play,”

Her hands slide up his legs, reaching for the top of his work trousers, sliding them down.

The man above her steps backwards.

“Fuck, (Y/N), doll, stop,”

“Need you so bad. I’m gonna die, Jamesy.”

His eyes widen for the nth time at the sudden change in her voice. She sounds genuinely upset. Genuinely scared.

“I don’t wanna die. I just want the pain to go away, need my big brother to take care of me like he always does.”

She crawls forward again, repeating her previous actions and pulling his pants down, his semi-erect cock slipping out and she wastes no time before letting it fill her mouth.

He stops trying to fight it. He wants to, but fuck, she looks like she’s dying. He believes her words.

“Oh fuck,” The man’s head lolls back as he feels the warmth of his mouth.

She wastes no time in forcing the man’s cock down her throat, surpassing her gag reflex and pressing her lips to his pelvis.

“Oh fuck, baby, oh fuck,” He recites the words like a prayer, but no God will save him now.

Her eyes look up and meet his stare.

His mind is reeling with so many thoughts.

Has she always looked this fucking good? How the hell has she learned to take cock so fucking well? Is she a whore? God, he hopes so. He wants to be the only man to ever break her. The only man to ever know what a good little slut she is. For him and him only.

“Look so fucking pretty on your knees for your big brother, baby girl.” Her eyes roll at the praise, pulling back to take a quick breath before working his shaft until he’s grabbing her hair and thrusting into her mouth like he’s been possessed. “That’s a good fucking girl, let me use that filthy mouth.”

His hips are relentless. Abusing the poor girl’s mouth but she has absolutely zero complaints. Her mind is clouded with nothing but lust. She knows nothing but to spread her legs for anyone she can see.

“Fuck me, Bucky,” She whimpers as the man pulls out for a second.

She lays down on her back, spreading her legs once more and staring up at the feral eyes of her brother.

“Fuck my pussy, fill me with cum, Jamesy, please,”

“Fuck, baby,” He groans, reaching down and lifting the woman up.

He lifts her into his arms, her legs wrapping around his hips, arms around his neck.

“Want me to fuck you? Need your big brother to fill your tight little pussy with his cock? Make you feel good, baby doll? Is that what you need?” He growls against her, their lips barely touching.

“YES! Yes, fuck, Bucky, please, fuck me, fuck my pussy.”

Without another ounce of doubt in his mind, the man lines up his fully-erect cock with her pussy and slams it inside her.

“FUCK!”

“BUCKY!”

Their moans are in sync and the forbidden nature of their activity is long-forgotten as the soldier basks in how good she feels around his cock.

“Feel so fucking good, princess. This was you needed? Needed your big brother’s cock to fill you up and take away the pain?”

“Fuck, James, yes, feels so fucking good, don’t stop, don’t stop!”

“I’m not stopping, baby, I’m not stopping til you gush all over my cock like a good little slut.”

The only sound on the Jet is their moans and cries as Bucky rids the woman of all her pain.

“Fuck, I’m gonna cum, I’m gonna cum- James, fuck, gonna make me cum on your cock.” (Y/N) all but whines, Bucky turning to slam her body into the nearest wall, using the aid to fuck into her harder. Deeper.

“Yeah, doll? Fucking give it to me, princess. Cum all over your brother’s cock like a good little whore. Let me see how fucking good you can be for me.”

Their eyes lock once more and Bucky can’t help himself from slamming his lips onto hers, tongues invading each others’ mouths as she groans and squeezes him like a vice, gushing all over his shaft as he continues to thrust into her at a relentless pace.

“God, baby, who knew you’d feel so good on my dick?”

Her head holds zero thoughts besides knowing that being sexually relieved will stop the pain. That’s all she knows, and the man in front of her is the only possible candidate and, boy, is he giving her exactly what she needs.

“Don’t stop, don’t stop, don’t stop!” She cries, rapidly feeling her third orgasm of the day approaching.

Using the balance of the wall to his advantage, Bucky uses one arm to hold the woman up against it whilst his flesh one leaps to her throat, lightly wrapping around it and squeezing.

“Gonna cum for me, (Y/N)? Such a little whore, can’t stop cumming on her big brother’s cock. Give it to me, baby, give me all of it.”

The words are the harmony to the bass that’s throbbing through her entire body.

“Bucky!” She gasps, sweat-covered foreheads pressed against one another as she’s overcome with euphoria.

The clench of her walls around his dick is overwhelming.

“Fuck, I’m gonna cum, baby doll, gonna fill up my little sister’s slutty pussy with all my cum. You want that, baby? Tell me. Tell me you want it.”

“I want it so bad! I need it! Need my big brother’s cum in my pussy, daddy, please!”

The small pet name is all it takes for the man to lose control. His hips thrust into the woman, moaning her name over and over as he fills her as deep as he can.

“Fuck, baby, yes, take daddy’s cum!”

The cry that pours from (Y/N)’s lips is enough for them both to know that the orgasm was most likely enough to knock her out of the sex-craving cloud she’s trapped in.

Bucky’s thighs are trembling as he comes down from his high, (Y/N)’s head resting on the soldier’s shoulder as he does the same to her.

They remain silent, both their heads fuzzy with what the hell just happened.

“Sweetheart?” Bucky is the first to break the silence. (Y/N) hums a response. “You back with me?”

Tears fill the woman’s eyes once more but these ones aren’t due to pleasure.

She hums again and nods against his shoulder.

“Okay, baby.” He whispers, taking a deep breath.

His number one priority right now is making sure his sister is okay.

“I’m gonna pull out, okay, doll?”

She nods again.

With both hands now having returned to holding her up, the brunet slowly slides out of her hole, hating the whimpers that erupt from her lips at the feeling.

“I know, sweetheart, it’s okay, I’ve got you.”

She knows he does. He always does.

“M’gonna sit you down on the bench, okay? Gonna clean up between your legs if that’s okay with you?”

She simply hums another acknowledgement of her sibling’s words.

“Give me your words, princess.” She won’t meet his eye when she’s laid down on the bench, Bucky feeling his heart crumble.

“Okay.” It’s barely a whisper.

He doesn’t rush anything right now, simply focuses on looking after his sister who he loves more than life itself.

He grabs some wet wipes from the treatment bag onboard the Jet and begins gently cleaning up the mess coating the woman’s thighs and other regions.

“All done, princess.” He utters, tossing the wipes into the bin across the way.

He helps her redress, as well as himself, before kneeling down in front of her as she’s sat on the bench.

“Can you look at me, baby?”

Her eyes are glued to her lap, fingers fiddling with each other in an attempt to distract herself from everything she just did.

“(Y/N), sweetheart, please,” He begs, taking her hands into his own, eyes desperately trying to capture the attention of her own.

She finally gives in and glances up at her brother.

Brother.

Tears are spilling over in an instant, uncontrollable sobs following suit.

“Oh, baby,” Bucky consoles, leaning forward and letting the woman dive into his arms, clinging onto him as she cries. “It’s okay, sweetheart, shh, it’s okay. I’m right here, I’m not going anywhere, okay? We’re gonna be okay.”

She’s gripping at his t-shirt like it’s keeping her held together. Her knuckles are white, Bucky attempting to loosen her grip.

“You’re gonna hurt yourself, doll.”

“So what!?” She breaks, looking up at her brother once again.

His brows furrow.

“I just fucking seduced you into fucking your own sister because of a fucking drug because I wasn’t more fucking careful!” She yells, flinging her arms about in an attempt to express her frustration.

“(Y/N), stop! Calm down and just breathe!” He grabs her wrists and sits them back down in her lap, not releasing them.

“I fucked up.” Her voice drops back down to a mere whisper.

“No you didn’t, sweetheart. First of all, you were under the influence of a drug, second of all, I was the one not under the influence and yet I still let it happen, so if anyone is to blame here, it’s me.”

Her head shakes in disagreement.

“I seduced you.”

“So fucking what? I fucked my own sister when she wasn’t capable of rational thoughts.”

Stating the fact aloud makes him tense up. The daunting realisation of what he just did.

“I’m so sorry. I know sorry isn’t enough, it doesn’t even come close, but I thought you were dying, I just-”

“I was dying! I remember the fucking pain, Bucky, I remember it. You needed to.”

The pair simply rest their foreheads against one another and remain eye to eye as they try and calm each other down.

They crossed the line and should never be crossed between siblings, so what happens now?

She gulps and licks her lips, an action that Bucky’s eyes are immediately drawn to before quickly catching himself in the act.

They’re trying to read each other's minds for any answers of what the hell they’re both thinking.

“(Y/N)-”

“James-”

They start at the same time, both giggling at the action.

“Go on, sweetheart-”

“You first-”

Another round of laughter.

“I’m sorry for what I did but I’m not sorry for how good it felt.” She whispers, his eyes widening ever so slightly. “I know it’s wrong, we can’t and won’t do it again. Once we’re off this Jet we never speak-”

His lips are on hers instantly.

Her eyes widen but she doesn’t stop him. She welcomes him.

“Once we’re off this Jet, right?” He whispers, her own eyes staring at him with a look that asks: are we really doing this? But she nods. “Then what happens on this Jet stays on this Jet, right?”

“Yes, Bucky,”

“Good girl.”

She moans. Truly. Wantonly. With zero regret.

“Bucky, this is wrong.” She mutters between kisses.

“I know, sweetheart, but tell me to stop and I will, no questions asked. Tell me you want it and I’ll take good care of my sweet girl.”

Another moan.

“Tell me to stop.” He notes, lips moving down her neck. His teeth nibble down on the skin before his tongue smooths it over.

“Fuck, don’t stop,” Is the full permission he receives in a gasp from the woman.

“Tell me to stop at any point, baby, and I will without hesitation, okay?”

“Yes, daddy.”

“Fuck.” The man all but growls.

His hands are pulling at the t-shirt that adorns her torso, ripping off her bra immediately after. She gasps but it morphs into a pleasant whine when the soldier’s lips wrap around her pebbled nipples.

“Who knew my pretty little girl was hiding such pretty tits, huh?”

“I never hid them-” She whispers, eyes intently watching the man toy with her body, her pussy throbbing with need once again.

His teeth bite down onto her right nipple, hearing her hiss in pain.

“Trust me, sweetheart, I fucking know. You think I don’t notice the tight tops and lingerie you parade around in? You think I don’t know that you’ve been fucking Steve and Sammy-boy behind my back?”

She gasps and widens her eyes.

“Buck, I-”

“Shh, baby girl, don’t worry, I don’t mind, I know they’ll both look after you, but I’m your big brother and no man will ever take care of you the way I will, alright? You and me against the world.”

“Fuck, yes, Bucky!” She screams as his fingers work their way into her trousers.

“That’s my fucking girl.” His fingers are quickly inside her, still soaked, pussy, despite him having cleaned her up. “So fucking wet for me, princess; I only just cleaned you up.”

“James,” She gasps, their eyes locking once again.

“God, you look so fucking beautiful like this. Desperate. Wanting.” He murmurs, pressing his lips to hers once again as he slides two fingers inside her hole.

She whines, biting down on her lip.

“Fuck, doll, I knew you were tight around my cock but you’re even squeezing my fingers.”

Who knew her brother had such a filthy mouth on him?

She would never have known, he’s only ever showered her with love and affection.

There’s a niggling voice in the back of her brain that’s screaming how wrong this is, but when has the life of James and (Y/N) Barnes ever been normal?

She’s pretty sure HYDRA got them to fuck under their control anyway. Something about breeding and getting more super soldiers. It, obviously, didn’t succeed.

Her hips start bucking against his digits, grinding her clit down on his fist.

“Look at the state of you, princess; so pretty and desperate just for my fingers.”

“Don’t stop,” It’s barely a whisper of a plea.

“Wouldn’t dream of it, baby girl.”

So many pet names. She’s addicted.

Steve barely calls her anything besides her own name in the bedroom, Sam’s a bit better but it doesn’t escalate much further than ‘little girl’.

She feels the coil in her belly tightening once more, and this time she doesn’t feel like she’ll succumb to death’s embrace if she doesn’t let that coil break, but she needs it just as bad.

“Gonna cum, fuck, yes…!” Her eyes roll back with her head.

“Cum for me, baby. Cum all over your big brother’s fingers like a good little slut.”

The words are once again reminding her of the filth she’s partaking in, and with whom, but she can’t stop the orgasm he gives her. Perfect pressure on her g-spot as his thumb puts the perfect amount of pressure on her clit.

She screams and grabs onto the man, nails digging into his minimal clothing in an attempt to ground herself.

“That’s it, sweetheart, that’s it, hold onto daddy. Let me make you feel good. Give me all that cum.”

It’s almost overwhelming.

Her breathing is rapid, mouth almost dry.

“Breathe for me, (Y/N), you’re okay. I’ve got you, doll.” He whispers, slowing down the movements of his fingers and using his other hand to hold his sister close, stroking her head and back in an attempt to calm her.

Tears fill the woman’s eyes once more at Bucky’s words. At the end of the day, even when they’re both mildly deluded and breaking laws and moral codes, he will still protect her.

“Bucky,” She whispers, pulling back and meeting his eyes with her own tearful ones.

“Hey, it’s okay, baby girl, it’s okay.” He sighs, seeing the woman’s tears and wiping them away. “You okay?”

She nods and a large smile etches onto her lips.

“More than okay.”

He chuckles and slides his fingers from her pants, admiring the glistening cum that coats them. The man holds no remorse as he keeps his gaze locked on hers, sliding the digits into his mouth.

“James…” She whispers, admiring the view more than she should.

“Taste like heaven, princess. That’s my girl.”

The whimper that escapes past her closed lips is not intentional. He smirks.

“We’re bad people.” She manages, searching his eyes for any sign of reassurance.

“We became bad people the second HYDRA put their hands on us, sweetheart.”

He’s not wrong.

“What happens now?”

Bucky shrugs, grabbing some more wet wipes and wiping her up once more.

“That’s up to you, angel.”

“We can’t tell anyone, they’ll think we’re insane.”

He chuckles slightly and shakes his head.

“We are insane, doll.”