Plus One
Summary: Steve’s lack of sex life and Bucky’s desperation to stop hearing about it leads to the idea of Steve sleeping with you, Bucky’s girlfriend. Turns out that was the best idea they’ve ever had.
WC: 4.1k | Warnings: smut, coarse language, unprotected sex, multiple orgasms, masturbation, protected sex, threesome (f/m/m), established relationship, oral (m receiving), think that’s all. | Masterlist
Bucky and Steve had been best friends for a long time now.
They would do anything and everything for each other, a bond between them that was damn near unbreakable and one that had withheld even the most chaotic and hardest challenges.
They stood by each other, looked out for one another, and they supported each other.
And sometimes, they shared things. Weapons, jackets, armor, you.
Oh yeah. You.
You’re Bucky’s girlfriend of the last two years, and to say he was out of his mind obsessed with you would be an understatement. He’s in love with you, there was no doubt to anyone about that. You’re his girl.
His girl who is also quite close with his best friend.
It didn’t start out that way. No, Bucky is very possessive of you, he wants to claim you, have you all to himself for as long as he’s alive. But that didn’t mean he wasn’t opposed to sharing you with Steve on occasion.
The whole thing didn’t make any sense. Bucky is so protective and possessive and aggressive when it comes to you, but he didn’t care that Steve also found you unbelievably hot.
Steve had been a lonely guy for most of his life, and he hadn’t let himself open up to anyone in quite some time. Bucky, being his best friend, often was the person Steve rambled on to about his non-existent love life, and how he wishes he could be one of those guys who fucks a girl then moves on without a blink.
But he’s not. He needs to be friends with people, he needs to connect with someone, he needs to know the person he’s sleeping with before he sticks his dick in her.
One night, Bucky had invited Steve over to his place since you’d be working late and he was bored, but when the blond arrived, he couldn’t stop talking about how the girl he just went on a date with kept trying to get in his pants throughout the whole thing. He complained about how he wanted to wait until at least the fifth date before he has sex with her, but she seemed persistent on wanting to do it on the first.
Safe to say Steve wouldn’t be seeing her again.
He had switched to the topic of his sex life and how he had to jerk off most nights since people these days just want to hookup and that’s it. You’d come home halfway through that conversation, and you were morbidly intrigued to hear more, so when Bucky spread his legs and patted his thigh, you eagerly sat down on his lap to listen to Steve’s rant.
It was after midnight, and Bucky had been in this exact position on the couch for the last four hours, his attention span really getting tested as he rolled his head to the side and stared at the muted TV screen that was playing a past football game. Bucky didn’t care for sports, but he didn’t think he could take listening to Steve complain about the lack of sex in his life for one more minute before he drives his head through the flat screen.
You were interested though as you shifted on his lap, sipping the last of the beer he’d been using as fuel to get through this conversation, even though he couldn’t actually get drunk. “Jesus, Steve,” you laughed, draping your arm around Bucky’s shoulder. “Your life is so miserable, even I feel tempted to have sex with you just so you can stop complaining about not having been laid in years.”
It was a joke, a harmless jab from his sweet and kind and sexy girlfriend, one that had Steve’s face heating up as he shook his head. But Bucky’s lips curved upwards, his hand on your hip tightening as he thought about it. He really thought about it.
Bucky never planned on sharing you. He wanted you all to himself and no one else, but if he had to share you with anyone, Steve would be the one and only person he’d feel comfortable enough with. He knows Steve’s a good guy, he knows he wouldn’t do anything you didn’t want to do, and he knew that the respect they have for each other was profound and solid.
Steve is well aware of the fact that Bucky plans to spend the rest of his life with you, so he doesn’t need to worry about his friend catching feelings or trying to steal you away from him. It was just sex. A way to get Steve to shut the fuck up about wanting to have sex with someone he knows and not a total stranger.
Bucky gets to have sex with you and then some, and he also gets the rest of you. He gets all of you, so the more he thought about it, the more open he became to the thought of letting Steve sleep with his girlfriend.
It was kind of a win-win in Bucky’s mind since Steve would finally get laid by someone he knows, and Bucky will finally be given a break from all the moping he’s endured from Steve.
And you, well, you got to sleep with a hot guy with full permission from your boyfriend.
“That’s actually not a bad idea,” he spoke up, feeling the way you froze on his lap. He squeezed your hip, metal fingers as gentle as they could be as they grazed the skin of your waist.
“What?” you laughed, looking down at him as you loosely held the neck of the bottle between your fingers. “I was joking, baby.”
But he was looking over at Steve now, and you followed his gaze. The blond furrowed his brows, eyes flickering between yours and Bucky’s as he saw the thought process begin in your mind, your expression relaxing as you thought about what he was suggesting. “Bucky-” Steve sat up a bit straighter, his hands coming up in a defense gesture as he shook his head, as if he was the one who came up with the idea, not Bucky. “Dude, I-”
“What?” Bucky cut him off, leaning back against the couch in a casual slump. “I don’t mind. And as long as she doesn’t mind, I don’t see why not. It’ll finally get you to shut the fuck up about your lack-luster sex life.”
“Bucky,” you laughed, gently slapping his chest. When you looked over at Steve, your expression softened, and you gave him a reassuring smile. “It’s fine, Steve, and it’s fine if you don’t want to. I was just kidding, but I also don’t mind helping you out in that way, if you’d like me to.”
Steve swallowed harshly, his hands rubbing along the front of his jeans. “I wouldn’t… I don’t want to mess things up between the two of you,”
Bucky shrugged, his thumb stroking along your hipbone under your shirt. “We’re fine. We’re solid,”
You nodded in agreement, and Steve’s face was a bright shade of red as he let out a shaky breath, his eyes hesitant, but his body so clearly betraying him. “Sure…” he trailed off, his voice sounding strained even to his own ears. “Okay. Yeah.”
And that was how it started.
That night, you started off with something simple, a blowjob right there on the couch, where Steve came pretty quickly, painting your cheek and chin white since there had to be some rules set in place.
Steve could have you, most of you, but he couldn’t do super intimate things. Coming in your mouth? Hell no. Fucking you raw? Absolutely not. Kissing? There was a fine line with that one. If either you or Bucky thinks he’s going too far, you’ll pull back, or Bucky will grunt at him in warning. It was understandable, because you are still very much Bucky’s girlfriend, and anything that comes across as too intimate was off limits.
But so far so good. And it was so good.
That night on the couch was a few months ago, and Steve hadn’t complained about his sex life once since then.
It was obvious as to why, because Bucky knows better than anyone how fucking incredible your body is, and how intoxicatingly addictive your pussy is.
Steve was in heaven.
Pure, tight, wet heaven as he fucked into your sweet pussy from behind. You were on your hands and knees on yours and Bucky’s bed, your naked body jolting forward with every sharp fuck of Steve’s hips.
Across the room, sitting on the chair in the corner was Bucky, his jeans pushed down to his thighs, his hard cock in his hand as he lazily stroked it. He’d invited Steve over to hang out and catch up, and then you came home, and things escalated.
Steve was horny, and you were more than willing to let him pull you into the bedroom and have his way with you. It felt like second nature since he’s done it so many times now. And yet he still finds himself feeling a little jealous that you’re Bucky’s girlfriend. You’re Bucky’s. Not Steve’s.
But Steve had become as obsessed with you as Bucky is, but he couldn’t tell either of you that. Bucky would shut it down so fast, go back to having you all to himself and would never let Steve be in the same room as you again.
So he kept it hidden. He was selfish like that, because you and Bucky had both been so selfless, sharing this part of your lives with him. He wasn’t about to fuck it up.
Your moans were music to his ears as he gripped your hips, his fingers digging into your soft skin. “Goddamn,” he muttered, his hips slapping against your ass with every thrust. “You’re such a lucky son of a bitch, Buck.”
Never in a million years did Steve ever think he’d be railing his best friend’s girlfriend while in the same room as him. It was unheard of, and yet he didn’t give a shit.
His praise made you laugh, and Steve moaned louder as Bucky hummed in agreement. “I know, man,” he said, stroking his cock a little faster as he looked over at you, only ever keeping his eyes on you.
“Christ, she’s so fucking tight,” Steve grunted, leaning back to watch the way his cock disappeared deep inside you, then reappeared, the condom covered in your slick. “God, you’re so fucking tight. So warm and wet. Fuck, you feel so good around my cock.”
You moaned, your eyes hooded as a fucked out expression took over your face. Your hands were gripping the sheets tightly, your body jolting forward with every impale of Steve’s cock. The room was filled with the sound of skin slapping against skin, and you moaned as you watched your boyfriend jerk himself off. “Mhm, Bucky loves my tight pussy too, don’t you, baby?” you purred, grinning at the way Steve’s pace stuttered briefly when you clenched around him.
Bucky groaned, his hand sliding up and down his cock. “Fuck yeah, I do,” he muttered, his voice deep and raspy. “Nothing compares to your perfect little cunt, baby. Nothing feels better than you.”
He slowly stood up from the chair, his cock bobbing in his hand as he moved closer to the bed. His jeans hung low on his hips, pulled down just enough for his dick to be freed. You smiled up at him, leaning into his touch when his metal hand came up to caress your chin.
Steve picked up the pace, his fingers curling around your hips more firmly. “Fuck, I can’t believe how good you feel,” he panted, his gaze fixated on where you and he are connected.
You gave him a pretty, way too innocent looking smile over your shoulder, your teeth sinking into your bottom lip. “You feel good too,” you murmured, meeting a few of his thrusts halfway before turning back to Bucky. You reached for him, pulling him closer until his knees were pressed against the front of the bed. “I want you to feel good too, baby.”
You wrapped your hand around his cock, giving it a few slow strokes before you took him into your mouth. Bucky grunted, his hand sliding into your hair as you licked along the underside of his cock. “Fuck, just like that, baby,” he groaned, his hips rocking gently to work himself deeper inside your mouth. “You’re such a good girl. You’re my good girl, aren’t you?”
A muffled moan escaped your lips as you nodded slowly, one hand leaving the sheets to grab Bucky’s hip. Steve’s pace stuttered a bit, one of his hands sliding up to grip your shoulder as he pulled you back onto his cock over and over again. “You’re incredible, Y/n,” he praised, his brows drawn together from the intense pleasure building up inside him. “God, I wish you were mine.”
He didn’t mean for that to come out of his mouth, because he knew that was nearing the line he was not allowed to cross with you and Bucky, but you just laughed. With your mouth around Bucky’s cock, you laughed.
And somehow Steve became even more gone for you.
You pulled away from Bucky, your hand continuing to stroke along his wet cock, and you smiled up at him with your puffy lips and glistening chin. “What are you gonna say to that, baby?” you asked, pressing a soft kiss to the tip of Bucky’s dick. “He wants me too… wishes I were his.”
Steve’s pace stuttered a bit at that, and he didn’t want to meet Bucky’s eyes while he’s balls deep in his girlfriend, and he didn’t want to see the set in his jaw or the look on his face that would let him know that this will be the last time he’ll get to have you like this.
If he had looked up, he would’ve seen the way Bucky’s eyes darkened possessively, and seen the way his hand tightened in your hair. He would’ve seen the hint of jealousy Bucky wasn’t used to feeling around his best friend.
He also would’ve seen that, as quickly as that jealousy formed, it faded just as fast. “He wishes,” Bucky murmured, his voice low and deep and confident as he ran his thumb along your bottom lip. “But you’re mine, baby. My gorgeous, sweet and perfect girl. You just like helping him out sometimes, don’t you? That’s all this is.”
His voice was teasing and a little condescending as he gripped the base of his cock and guided it back to your mouth, and you all too eagerly took him back inside. When Steve did take the chance and lift his gaze, Bucky wasn’t looking at him. Instead he was focused on you, his flesh hand cradling your jaw while his metal one pulled gently on your hair.
He didn’t completely fuck this up and ruin one of the best situations he’s ever accidentally gotten himself in. That was good. This is good.
Steve was close, his thrusts becoming quicker and harder as you whined around Bucky, your eyes fluttering shut. You felt perfect, tight, wet and warm, and he had to grind his teeth together to quiet himself down. Your sounds, even though they were muffled around Bucky’s cock, were the very things he thinks about now when he’s alone, and he’d rather hear you than hear himself.
You clenched around him, and Steve’s pace stuttered once again. “Fuck, I’m close,” he grunted, equally hating and loving how he could never last long with you. You felt far too good, squeezed him just right, and fit him better than anyone else ever had. “You’re so tight.”
You moaned appreciatively as Bucky moved his hand to your throat so he could feel how deep he was inside your mouth. His blue eyes were blown wide with lust as he looked down at you like you were his entire world, his hips moving more urgently as he fucked your mouth. “You feel so good, baby. You’re such a good girl,”
Steve looked down and watched himself slide in and out of you, his hands tightening their hold on your hips. “Jesus, I’m gonna cum,” he rasped, feeling his stomach clench with his impending release.
Bucky pulled out of your mouth, his cock slick with your spit. A string of saliva connected his tip to your lips before it broke, and he grabbed your chin, tilting your face up so you were looking at him. “Clench that pussy for him, baby,” he murmured, brushing his thumb along your swollen lower lip.
You obliged all too willingly, clenching around Steve until he was thrown head first over the edge, his hips jerking and his eyes squeezing shut. His head fell back as he came, filling the condom up and desperately wishing there wasn’t a layer of latex between you and him.
A quiet moan left your lips as you wiggled back against him, nuzzling your face into Bucky’s palm. Steve had to force himself to pull out of you, when all he wanted to do was stay buried inside of you for the rest of the night, but then he watched Bucky lean down to kiss you, and he knew his time, as well as his turn, was up.
When he pulled out of you, you moaned against Bucky’s mouth before moving onto your knees on the bed, your arms draping around your boyfriend’s neck and your chest pressing right up against his. “Your turn, baby,” you murmured against his mouth.
Bucky grinned against your lips before kissing you again, his arms wrapping tightly around your middle as he held you against his hard body.
This was Steve’s least favorite part. He usually got you first, but once he was finished, he had to sit back and watch you and Bucky be all over each other in the way you’d never be all over him. It was bittersweet, mainly bitter. But he still sits through it, because it forces him to realize that he’ll never have all of you like Bucky does. You’ll never be all his, and he’ll never have your heart.
He moved away, still breathing heavily as he slumped onto the chair Bucky had been in only five minutes ago, his body still trembling with the aftershocks of his orgasm.
Bucky’s large hands slid down your body until they found your ass, and he lifted you up against him as he crawled onto the bed, following you down until he was hovering over you and caging you in with his much bigger body. He settled between your legs, the tip of his cock nudging against your core, your slick making it easy for him to push inside you.
“Fuck, you’re still so tight,” he groaned, his forehead dropping against yours as he bottomed out inside you. “So fucking perfect for me.”
He started to move, setting a deep, steady rhythm that had him hitting all the right spots deep inside your weeping pussy. One big hand slid under your thigh, pulling your leg up around his waist so he could go even deeper.
Bucky knew just how to touch you, how to fuck you, how to make you fall apart for him. It came with years of having you like this, of exploring your body and making it his over and over again.
You moaned loudly, your arms wrapping tightly around his shoulders as he fucked into you. “God, yes,” you gasped, tangling your fingers in his hair as you arched your back off the bed. “So good.” Your voice was whiny as your hands slid down Bucky’s broad back until your fingers dug into his ass, your nails leaving half moon indents behind.
Bucky grunted as your nails dug into his skin, urging him to thrust harder and deeper and faster, claiming your body after it was filled by his best friend. This was his favorite part, the part when he got to fuck you like he had a point to prove.
He leaned down and kissed you deeply, swallowing your moans as he fucked you into the bed. He’d been on edge from your mouth, and you’d been on edge from when Steve fucked you, so when he felt you flutter around his cock, he knew you were close. “That’s it, baby,” he muttered against your mouth. “‘M gonna make you cum on my cock.”
You whined against his lips, your body heating up in an intense blush. “Fuck yes, baby,” you moaned, your hands sliding back into his hair. You pulled away from his lips and looked up at him, your brows drawn together in a furrow as he worked you to your high. “I love you so fucking much, Bucky.” you whispered, intending only for him to hear the words, but of course both men heard you.
Bucky leaned down and peppered kisses along your jaw and neck, his deep grunts lost against your skin. “I love you too. So fucking much,” he breathed, sucking a mark onto the base of your throat. “You’re everything to me.”
Steve’s stomach twisted in a nasty feeling he had no right to feel. He had no business being jealous of the two of you, no business being jealous of his best friend when Bucky had been so selfless in sharing this part of you with him because of Steve’s lack of a sex life.
Another reason why he forced himself to sit through this part of the deal.
Bucky ground his hips against yours, his pelvis rubbing against your clit with every deep thrust. “Cum for me, baby,” he mumbled, nuzzling his nose along your jaw before connecting his mouth to yours, swallowing your cries as he felt you clench around him, your release coating his cock with nothing in between to separate you and him.
He grunted into your mouth as he came too, filling you up to the brim as his hips rolled against yours, fucking his cum deeper into you. He pulled away from your mouth and pressed his body against your own, his arms wrapping tightly around your waist.
“Fuck, that was so good,” he panted, burying his face into your neck as you tried to catch your breath.
After a few seconds, he rolled to the side, pulling you flush against his chest as he draped a rather possessive arm over your waist. You giggled softly, cuddling against him as you turned your head and watched Steve stand up and begin to pull on his clothes. “Thank you for a fun last few hours,” you grinned up at him, making Steve meet your gaze as he pulled his jeans back on. “I think I’ll be sore for a while.”
Steve’s mouth curved upwards in a small but genuine smile, and he took a few short steps to the bed, and he leaned down to press a soft kiss to the top of your head. “Thank you,” he said back, his eyes lingering on you for a few more stolen seconds before standing up straight again. “You’re amazing. You always are.”
As he reached for his shirt, Bucky pulled you closer to him, his other hand resting on the curve of your ass. “Mm, I think Bucky wants his cuddles now,” you laughed, breaking eye contact with Steve as you turned over in Bucky’s arms.
He held you against him, your warm, naked body pressed right up against his own. “I always do,” he murmured, pressing a firm kiss to your cheek.
Steve felt that bittersweet feeling wash over him again as he pulled his shirt over his head. “You’re a lucky guy, Buck,” he mumbled, “She’s… she’s special.”
Bucky lifted his gaze and looked up at him, his expression stoic. “Sure is,” he agreed, his metal hand coming up to cradle the back of your head as you buried your face in his neck. The way he looked at you spoke all the words he didn’t need to say.
You’re his everything. His rare gem in this unforgiving world. The one person he’d let get away with anything.
Steve swallowed a little harshly as he stepped away. “Well, I should go. Got an early morning tomorrow,”
Bucky’s face dropped as he rolled onto his back. “Right, the debriefing,”
Steve nodded and turned around, heading towards the door as an ugly feeling weighed heavily in his chest. “I’ll see you then,” he said, keeping his back to the both of you.
Bucky hummed, nodding at his back as you waved lazily, even though Steve couldn’t see you. He’d done this routine before, he knew how this whole thing plays out once it’s over.
And now you and Bucky were back to being blissfully all over each other, and Steve was back to pretending you weren’t invading all his thoughts, and pretending like he wasn’t falling for you.












