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cosmicwavelengths · 19 days ago

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Round Two

possessive!bucky barnes x reader

summary: Tension explodes in the training room when Bucky walks in on you sparring a little too close with Walker. He doesn’t say much but when he takes over the session… well. Jealous!Bucky Barnes it is.

word count: 3397

WARNINGS: 18+ explicit content, MDNI. curse words, dirty talk, degrading kink, dry humping, fingering, oral (f receiving), PiV, unprotected sex, rough sex, semi-public sex, breeding, overstimulation, possessive behavior, jealous af, fully consensual by both parties although not explicitly stated.

A/N: Sigh. I had this in my head ever since watching Thunderbolts* and recent work of @iamthatonefangirl pushed me into finally writing it down. Do not expect much plot from it… or any plot at all. Writer has no regrets.

The training room was filled with the rhythmic thud of your boots against the mat and the sharp, quick breaths you shared with Walker. His presence was overwhelming — tall, broad-shouldered, every muscle coiled like a spring ready to snap. You could feel the heat radiating off his body, mixing with your own rising warmth.

You circled each other warily, muscles taut, eyes locked like predators. Walker’s grin was cocky, but there was an edge of respect in it. “You’re stubborn,” he said, voice low and teasing.

“Yeah, well,” you shot back, dropping into a defensive stance, “you’re slow.”

His laughter was rough as he lunged forward, grabbing your wrist and twisting, forcing you down toward the mat.

You fought against him, every inch a battle — but he was strong, and before you knew it, your back hit the padded floor.

Walker was on top, chest pressing against yours. You could feel the solid heat of him, the strength beneath his armor. Your arms were pinned, but your eyes stayed locked with his, breaths mingling in the tight space between you.

“You holding back?” he whispered, his breath warm on your face.

You smirked, muscles flexing as you pushed against him, trying to twist free. “Not a chance.”

His hands slid down your arms, skin to skin, the contact electric, and for a moment, the fight faded into something else — a tension thick enough to choke on.

Walker shifted, lowering his mouth to your ear. “You’re playing a dangerous game.”

You swallowed hard, heart pounding loud in your chest, and the taste of his breath — spicy and close — sent a thrill racing through you.

With a quick movement, you twisted, trying to flip him off you, but Walker caught your wrist and held you fast.

His face hovered inches from yours, the faint scrape of stubble against your cheek making you shiver.

“Almost had me,” he murmured, voice rough.

Your fingers brushed his jaw, accidental but electric, and his eyes darkened, holding you captive in that intense gaze.

Neither of you moved. The room was silent except for your ragged breathing and the thudding of your heartbeats, syncing in the small space where your bodies met.

You felt the heat pooling low in your belly, the line between fighting and wanting blurring with every second.

Walker’s hand slid up your arm, fingertips trailing lightly, sending sparks where they touched.

Your lips parted, breath hitching.

The door slid open, and Bucky Barnes stepped inside. He paused, taking in the scene: you pinned beneath Walker, bodies close, breaths heavy and mingling.

His jaw clenched, but he said nothing.

You pushed Walker off with a quick grunt, breathing hard but flashing a grin. “Round two?”

Walker gave a lazy shrug, stretching one arm. “Wish I could, but I gotta run.”

You frowned in disappointment. “Already?”

“Yeah,” he said, smirking. “But maybe Bucky here can take over.”

Walker clapped Bucky on the shoulder before heading out, leaving the two of you alone.

Bucky’s eyes locked onto you, sharp and cold like ice cutting through steel. His jaw clenched so tight you could almost hear the grind.

“I guess I’m stuck with you now,” he growled, voice low and rough - no hint of warmth.

You blinked, caught off guard by how harsh he sounded. “Stuck? It’s just training, Bucky.”

He took a step closer, his gaze burning holes through you. “Yeah, well, sparring with him? That looked less like training and more like… whatever that was.”

You frowned, heat creeping to your cheeks. “What’s that supposed to mean?”

Bucky’s lips curled into a bitter smirk, voice dripping with sarcasm. “Oh, come on. You don’t get that close with Walker — arms locked, skin on skin and expect me to not notice?”

Your heart thudded loud and fast. “We were sparring, Barnes. You’re reading way too much into it.”

Bucky scoffed. “Whatever.”

You barely had time to catch your breath before Bucky lunged forward, his movements sharp and aggressive — like a storm about to break loose.

His fist came at you harder than necessary, forcing you to scramble back and dodge. This wasn’t training. This was punishment.

“You getting cozy with Walker?” His voice was low, clipped, cutting like a knife. “Don’t think I’m just gonna stand here and watch.”

His hand shot out, grabbing your arm with a grip that was rough and unyielding. You winced but didn’t pull away. Not yet.

“Not on my watch.”

Bucky closed the space between you, chest pressing against yours, fingers digging into your arm like a silent command. No words explaining it. No apologies.

Just the cold, hard truth of his possessiveness, raw and undeniable.

He dropped back into stance, voice sharp. “You want to spar? Fine. But don’t expect me to be gentle.”

Every strike was laced with frustration and something harsher — a need to remind you who was in control, without ever saying it.

And the tension between you? Thick enough to choke on.

The second Bucky’s hands locked around your waist, pulling you flush against him, your breath hitched, heart pounding. His metal hand closed over your wrists behind your back, holding you captive with a grip that was equal parts demanding and possessive.

You could feel the hard, unmistakable press of him — his arousal, firm and urgent against your lower back, the weight of it making your breath falter.

“Thought you could get close to Walker and not have to deal with me?” His voice was a low growl, rough with something dark and dangerous.

His breath ghosted over your ear, warm and intoxicating, sending a delicious shiver down your spine. Your body burned where his pressed against you, every nerve screaming with need.

Without warning, Bucky’s metal fingers tightened on your wrists, tilting your hands upward so he could lean in, lips brushing over your neck, trailing a rough kiss down to your shoulder.

You gasped as his body pressed harder, hips grinding just enough to make it impossible to ignore what was between you — the undeniable proof of how much he wanted you.

“Not so fast,” he murmured, voice thick with desire. “You don’t get to tease me like that.”

His touch was rough, needy, his control slipping as his hands slid from your wrists to your waist, fingers digging in possessively. You could feel his arousal straining against the fabric of his pants, pressing into you with a hunger that matched your own.

Your skin tingled where his metal hand traced slow, demanding lines along your ribs, igniting a fire that burned hotter by the second.

You let out a soft gasp as his hips pressed into you again, the hard length of him undeniable. Heat flooded your core, your thighs pressing together instinctively. His breath was right against your neck, lips just barely grazing your skin.

You could’ve leaned into it, let him take what he clearly wanted — but instead, you smirked.

Then you twisted.

With a sharp pivot of your hips, you slipped out of his grip, ducking beneath his arm and spinning away. Bucky stumbled half a step, blinking like he hadn’t expected you to escape.

“Thought you were gonna teach me a lesson,” you said, breathless but smug as hell.

He turned slowly, eyes narrowing, jaw flexing hard. “You think this is a joke?”

You shrugged, backing into a loose stance. “I think you’re wound a little tight. What’s the matter, Barnes?” You tilted your head, letting your eyes flick deliberately down his body — right to the straining bulge in his pants. “Need a break?”

The fire in his eyes ignited.

He was on you in a flash.

This time when he moved, it wasn’t just precise — it was brutal, desperate, controlled only by the thinnest thread of restraint. His fists came hard and fast, forcing you to block, deflect, move. He wasn’t holding back anymore.

You ducked, landed a light kick to his thigh, then laughed when he caught your ankle mid-move and yanked, dragging you closer.

“Still think this is a game?” he hissed.

You were breathless, heart pounding, adrenaline and arousal tangling into one intoxicating buzz.

“Depends,” you teased, lips curling. “What do I win if I pin you?”

He growled and shoved you back, body surging forward to slam you to the mat. This time, it was no accident when his hips landed flush against yours.

No pretense. No holding back.

Just his hard cock pressing into your core, and his hand pinning both your wrists above your head.

His breath hit your cheek, ragged and heavy.

“You want to play?” he asked, voice low and dangerous. “Then fucking play.”

Your breath caught in your throat as Bucky hovered above you, pinning your wrists down hard against the mat. His chest heaved, muscles tense and trembling with restraint, but it was the weight of him between your legs that really made your head spin.

You shifted — just barely and that was all it took. Bucky’s hips snapped forward, grinding his cock against your clothed core with a force that stole your breath.

“You like teasing?” he growled, the sound rough, ragged. “Keep fucking squirming. See what happens.”

You did. Of course you did.

You tilted your hips up with slow defiance, grinding back against the thick heat of him beneath his tactical pants. The friction was maddening, perfectly filthy — your underwear soaked instantly as you dragged yourself along the length of him.

A dark, broken sound ripped from Bucky’s throat, and then he was moving — grinding into you with a rhythm that had your head rolling back and your thighs trembling.

His metal hand kept your wrists pinned above your head while his flesh hand gripped your hip, hard enough to bruise, dragging you into each thrust like he needed you to feel every inch of him through the layers.

“You don’t get to look at him like that,” Bucky hissed, rutting harder. “Don’t get to give that to anyone else.”

You gasped, back arching as his cock rubbed right where you needed it, again and again, pressure building fast and tight in your gut.

“Bucky—” you started, but he cut you off with another deep, grinding thrust.

“No.” His voice cracked, low and dangerous. “You wanna act like a brat, I’ll fuck it out of you right here.”

Your moan was shameless, head spinning as his cock rubbed against your clit just right, over and over, your core clenching around nothing, desperate and soaked and grinding back without shame.

His lips were at your jaw now, rough stubble scraping, breath hot as he fucked into you with relentless rhythm.

“You feel that?” he growled. “That’s what you do to me.”

And god — you could. Every thick, heavy inch of him dragging over your leggings and your throbbing clit, every possessive grind claiming you without a single word of affection.

Your back arched beneath him, body on fire, every nerve burning where his cock ground against your soaked leggins. The sounds you made — ragged, breathless, needy — only pushed him further.

“Fuck,” he growled, his lips grazing your neck. “You’re dripping. You wanted this, didn’t you?”

You nodded and before you could answer vocally, his grip shifted — your wrists still trapped in his metal hand as his other slid down, slow and rough, until his fingers curled beneath the waistband of your leggings.

And then — rip.

You gasped as the fabric tore in his fist, panties along with it, shredded like paper. Cool air rushed over your soaked pussy, your thighs twitching at the sudden exposure.

“Bucky—” you breathed, but the way he was looking at you — eyes dark, jaw clenched, starving— shut you right up.

“Look at you,” he muttered, fingers gliding through your wet folds, spreading the slick mess you’d made. “Grinding all over me like a desperate little thing.”

He didn’t wait for a reply. Two thick fingers slid inside you — deep. The stretch sudden and perfect, dragging a cry from your throat as your walls clamped down.

“Fuck, that’s tight,” he hissed, burying them knuckle-deep, his thumb brushing against your clit with brutal precision.

Your body jolted, legs shaking, and he just smirked.

“This what Walker gets?” he growled, curling his fingers just right. “Or is this all mine?”

You couldn’t answer — you couldn’t think. Every pump of his fingers sent sparks through your spine, your hips lifting, chasing more, chasing everything.

“Say it,” Bucky demanded, voice low and threatening. “Tell me who this pussy belongs to.”

He pushed in harder, rougher, hitting that spot that made your thighs quake.

Your moan broke into a whimper.

“It’s—” you choked. “Fuck—yours, Bucky—it’s yours—”

His thumb circled your clit, slow and punishing. “Damn right it is.”

His lips found your neck again, biting down just hard enough to mark you, all while his fingers fucked you open—relentless, possessive, and dripping with control he was seconds away from losing.

Bucky’s fingers pumped into you hard and deep, curling just right as your hips rolled helplessly beneath him. Your body was slick, trembling, pleasure coiling fast and tight in your belly. You were so close it hurt.

And just when you were about to fall apart—he pulled away.

“No—fuck, Bucky—” you gasped, reaching for him, hips twitching.

He didn’t say a word—just grabbed your thighs, spreading them wide, dragging you down the mat until your soaked pussy was right in front of him. You barely had time to breathe before—

His mouth was on you.

His tongue licked a long, slow stripe up your slit, collecting every drop of wetness before diving in, deep and hungry, like a man starved.

Your back arched, a cry breaking from your throat as he sucked your clit into his mouth, tongue circling with maddening pressure.

“Oh my god—Bucky—”

He groaned against you, the vibration sending a shock through your spine.

Then he pulled back just enough to speak, his voice low, dark, mean.

“Tell me,” he said, breath hot against your dripping pussy. “Could Walker ever make you feel like this?”

Your thighs trembled around his head, body burning with shame and arousal all at once.

“I—no—fuck, Bucky, no—”

He smirked, just barely, before burying his mouth between your legs again, licking and sucking like a man obsessed, like he was trying to drink every sound you made.

His hands held your thighs open, thumbs pressing bruises into your skin as his tongue fucked into you, slow at first, then faster, messier.

You were soaking his face, writhing under him, hips lifting off the mat in desperation.

“You’re fucking mine,” he growled, voice rough against your soaked heat. “No one else gets this.”

Then he sucked your clit hard and you shattered.

Your orgasm ripped through you, a scream tearing from your throat as you came on his tongue, thighs clamping around his head, whole body twitching uncontrollably.

But Bucky didn’t stop.

He kept licking, kept sucking, dragging every last wave from you until you were shaking, a broken mess beneath him.

Finally, he lifted his head — his mouth wet with your slick, eyes dark and burning.

“Next time you think about sparring with Walker,” he said, voice wrecked, “remember what I do to you.”

You were still shaking from the orgasm he pulled out of you with his mouth — slick, breathless, your body twitching as he rose up over you, his face glistening with you.

Bucky’s hands slid under your thighs, lifting them roughly as he shoved his tactical pants down just enough to free his cock—and fuck, he was thick, flushed, leaking at the tip, already hard and twitching.

He didn’t give you a second to breathe.

He dragged the head of his cock through your soaked folds, slow and deliberate, coating himself in your slick before lining up at your entrance.

“Walker wouldn’t know what to do with you,” he growled, dark eyes fixed on your ruined body beneath him. “He couldn’t handle this.”

And then he slammed into you — deep.

You choked on your breath, nails digging into the mat as his cock split you open, stretching you so full you thought you’d lose your mind.

“Bucky—” you gasped, but he just grabbed your waist, pulling you into another brutal thrust.

“Say my name again,” he growled, snapping his hips forward. “Let the whole fucking tower hear who’s making you feel like this.”

“Bucky—oh my god—”

He fucked you like he meant it. Like every thrust was a punishment and a reward all at once. Deep, fast, grinding into you so hard your whole body shifted up the mat.

One hand pinned your hip while the other—the metal one—gripped your throat, not tight enough to hurt, just enough to hold.

“Mine,” he hissed, thrusting deep and slow now, cock dragging over your g-spot. “You understand me?”

You were crying out with every stroke, legs wrapped around him, back arching as the head of his cock hit you just right again and again.

“I said—do you fucking understand me?”

“Yes—yes, Bucky, yours—”

“That’s right,” he grunted, voice wrecked. “This pussy, this body — all fucking mine.”

He pulled out almost completely — just the tip barely inside — then slammed back in with a growl that sounded like it came from deep in his chest.

You shattered again, coming hard around him, clenching so tight he cursed loud, barely holding on.

He dropped his head into the crook of your neck, fucking you through it, grinding his cock into your spasming walls like he needed to burn your name into his skin.

And then he snapped — hips stuttering, breath ragged, and with a broken, desperate grunt.

He came inside you. Deep and hot. Filling you up.

He didn’t pull out. He stayed there, breathing hard, forehead pressed to yours, cock still twitching as he spilled every last drop into you.

The mat beneath you was soaked. Your legs were trembling. And Bucky?

Still didn’t move.

Still inside you.

Still possessive as hell.

Your body was limp, fucked-out and buzzing, still quivering around the load Bucky had just spilled deep inside you. You were warm, stretched full, his cock still hard as he stayed buried in you for a few long, heady moments.

Then, finally, he pulled out with a thick, wet sound — your walls clenching around nothing, the sudden emptiness making you gasp.

You felt it almost immediately. The slow, sticky drip of his cum sliding out of you.

But Bucky didn’t move away.

His gaze dropped between your legs, jaw clenched, and you could feel the way he was watching it—the way he watched himself leak out of you.

And then he looked up at you. Eyes darker than sin.

“Not done,” he muttered.

You opened your mouth to ask what he meant — but then his metal hand slid down your stomach and between your legs.

Two fingers — cold, slick, thick — pushed into your still-sensitive cunt.

You cried out, hips jerking, but Bucky held you down, his flesh hand gripping your thigh as he pumped those fingers deep inside you, slow and deliberate.

“Keep it in,” he growled, curling his fingers. “You think I’m gonna let it go to waste?”

Your head dropped back against the mat, spine arching as he fucked you with his fingers, thrusting everything he’d spilled back into you.

“Made you take every drop,” he whispered, lips brushing your ear now. “And now you’re gonna hold it. You hear me?”

Your cunt fluttered around his fingers, overstimulated and soaked again already.

He pushed deeper, scissoring you open, fucking his cum back inside like it belonged there.

“You were made for this,” he murmured, tongue dragging slow and hot against your neck. “To take me. To be filled by me.”

You whimpered, trembling as his thumb found your clit and circled it — lazy, almost cruel.

“God, look at you,” he rasped. “Still so fucking tight. You think Walker could do this to you? Make you this full? This messy?”

You moaned his name, your legs shaking, your body giving in all over again.

“Say it,” he said, voice sharp against your throat. “Say who this pussy belongs to.”

“You, Bucky—fuck—yours—”

“That’s right,” he growled, fingers curling just right.

You came again — a raw, desperate sound tearing from your throat as you clenched around his fingers, body rocking helplessly as he fucked you through it, never letting a single drop escape.

He didn’t stop until you were crying — sobbing his name, broken and full and so far gone you didn’t even know where you ended and he began.

And even then, his fingers stayed buried in you, possessive and proud.

“Next time you even think about sparring with Walker, remember how I filled you first.”

#cosmicwavelengths reads #bucky barnes #smut #mcu #bucky barnes x reader

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