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Listen, despite what Steve thought, Sam had nothing against the 6-foot, “greasy-haired and busted metal arm to match” guy he’d just met. Truly! Okay, yeah, fine, maybe he’d been sending him haphazard glances the whole day, always flitting his gaze away whenever the supersoldier tried to make eye contact with him. Actually, any time he tried to initiate contact, Sam was always the one avoiding him and fuck, it was so out of character for him; even Steve noticed it. But they had bigger problems to worry about than Sam pussyfooting around Steve’s oldest friend, so when Steve suggested Sam sit in the front of the car and Bucky in the back, neither of them opposed much. They’re in one hell of a hurry meeting Sharon, so the awkwardness in the car doesn’t really settle in until Bucky starts shifting around, his knees digging uncomfortably into Sam’s back through the back of his seat. He’s been at it for a while: Bucky grunts as he moves and it’s getting harder to ignore it or pretend like it does nothing for Sam’s (debated) voice kink.
Okay, he’ll admit it. The reason why he’s being so prickly around Bucky is maybe that he’s disgustingly attracted to him.
It’s so fucking embarrassing to say out loud, so he refused to acknowledge it at all. Or be nice to him whatsoever. Not when his stupid, rugged face made his stomach swirl with horny nerves or that smooth, gravely tone his voice took whenever he spoke to either Steve or himself. Wherever he found that red Henley shirt that’s two sizes too small for him…Sam just hopes he never has to get rid of it. It made it hard to keep his cool whenever Bucky tried to start a conversation with him but he’d be lying if he said he wasn’t attracted to Bucky’s eagerness to get along. And don’t get him wrong, Sam felt kinda sorry about it, Bucky hadn’t really done anything “wrong” but between his suspicions on whether this guy wasn’t still partially brain-controlled and using Steve’s kindness against them and him fighting his attraction towards said maybe-brain-controlled guy, Sam was a little colder than usual during the poor attempt at a conversation they were having whilst waiting for Steve to wrap up his conversation with his nth situationship.
“Sam? Can you open a window–”
“No.”
“...Well then, can you wave Steve over so he can come open th–”
“No.”
Sam could hear the grind of Bucky’s jaw from the back seat. He chooses to ignore when the action sends heat trickling through his body.
“...Can you at least move your seat up?” Bucky grunts, looking straight at him through the rear-view mirror.
“No,” Sam repeats icily. This time he gave in, made eye contact with Bucky through the rear-view mirror, almost challenging him with his gaze, an eyebrow raised.
What are you gonna do about it? He asks defiantly with his eyes.
The supersoldier would usually try to glare back, maybe pick a fight with him to pass the time, but this time he stares for a bit before huffing lowly and flicking his eyes away. Sam watches as his face quickly turns a deep pink, before Bucky shifts in place again, knee digging into his seat again.
“Will you stop that,” Sam hisses, annoyed. “You’re fucking up my back here.”
“Well, if you won’t move your seat up then–”
He explodes into a rant. “I swear to God, Barnes, if you ask me one more time. My legs are aching as it is, it’s not my fault there’s no fucking space in this car, so shut up about it!”
For a few seconds after, the car’s completely silent.
Fuck, okay maybe he had overreacted. It’s just…because of the heat in the car and how much Sam kinda wants to jump his bones despite how little space there was in the car, he’d maybe ended up being less kind about accommodating Bucky too. In all honesty, he really didn’t want to start their friendship on the wrong foot, not if they were still going to keep in touch after this whole Avengers feud was over. He seemed like a decent guy, more than decent actually; he’s just having a hard time holding all that attraction back. Ugh, he’d better just get the apology over and do–
Something catches his eye through the rear view mirror. Bucky’s avoiding his eyes, shifting around less, but he keeps lifting his hips off the seat to lift his pants off his thighs. To his credit, he was trying to do it discreetly but…well, there was nothing discreet about the growing tent in his pants. He definitely couldn’t cover it up with his hands without drawing Sam’s attention to it, but unfortunately for him, Sam had already noticed. Bucky sneaks a glance in the mirror, hoping Sam won’t be staring back, but alas, Sam has always had a knack for getting himself into sticky situations.
Maybe it was the annoyance of Bucky’s knee still digging into the back of his seat that prompted his response.
“Oh, look at that. Is that for me, Barnes?” Sam mocked, a little meanly.
And gosh, he really didn’t know where the brazenness came from. He obviously expects Bucky to try and deck him in the face; he’d deserve it honestly. He expects a glare or a hiss, just not…the red in Bucky's face darkening and the stifled moan that falls from his lips as he looks at Sam.
Two things immediately go through Sam’s mind.
One of which he voices out loud after the silence that follows Bucky’s moan.
“...You like this?” Sam whispers incredulously. And he knows it might get him in so much trouble but he adds quietly, “You like me being mean to you and your cock?”
The groan Bucky lets out as his head hits the back of the seat tells Sam everything he needs to know. The second thing that crosses his mind is how badly he wants to see Bucky cum in his pants. And yeah, maybe it was a little unhinged but it was just so hot in this dumb fucking car, and his attraction to Bucky made him act a little more eager than he usually is about these things.
Maybe…Maybe they could have a little fun while they waited?
“Sam,” Bucky whispers out as he tries to cover the bulge in his pants with his hands. He looks downright embarrassed at being caught but so turned on that it overshadows how mortified he’s feeling. It makes it hard for his apology to come out genuine. “I-I’m sorry this wasn’t supposed to–”
“Don’t lie to me,” Sam tilts his head with narrowed eyes as he says it. “You wanted me to see. Is this why you kept insisting about my seat? So I wouldn’t catch you out?”
This time Sam’s able to watch as Bucky’s cock twitches to life. The action sends straight heat to his lower stomach. He feels himself stiffening in response to Bucky’s heavy pants filling the silence in the car. Sam watches as Bucky uses the hand covering his bulge to palm his erection through his pants slightly, no longer uselessly trying to get Sam to look away. Instead, he holds contact with Sam’s eyes as he touches himself desperately over his pants.
“Sam–”
“Wait there.”
Sam climbs out of the car, heart racing with no idea what he was doing. Steve looks away from his conversation with Sharon towards him with a questioning gaze for a second but at Sam’s placating wave he zeroes back into his conversation with Sharon as Sam slips himself into the backseat next to Bucky.
“What are you doing?” Bucky hisses. “You’re gonna get us caught! What if he comes back here?”
“I know what I’m doing, Barnes, trust me.” Sam rolls his eyes before turning to face Bucky and his ever-raging dick. Sam licks his lips as his gaze flutters between Bucky’s eyes and the tent in his pants. “Don’t you want me to make you feel good?” he whispers, questioningly.
“I-I mean I do but S-Steve’ll be back any second now we can’t–”
“Then we’d better be quick then, shouldn’t we?” Sam whispers as he brings his own hand to the tent in Bucky’s pants and settles right on top of his bulge. Bucky hisses at the contact but doesn’t bat Sam’s hand away.
“The sooner you take your pants off a little, the faster we can finish,” Sam mutters convincingly, twirling a finger on Bucky’s tip over the now damp spot on his pants. Bucky leans into the touch, whimpering in pleasure already.
“Yeah, shit– okay, let me take these off.” Bucky frantically moves, trying to stop the car from moving too much as he unzips his pants and slips them off slightly, enough for him to get his boxers down. As soon as he does, his cock springs out of their constraints, thick and pulsing. Sam drools a little, wiping it away. He imagines just how good he could make Bucky feel with his mouth, if only they had more time and less of an audience. For now, his hand would have to do.
He slips his hand around Bucky’s girth, familiarising himself with the shape of Bucky’s cock in his hand. He’s hairy down there; years of coily growth Sam would get his nose in if he took Bucky deep down his throat right now. He begins stroking tentatively, lets Bucky twitch and buck his hips into Sam’s closed fist, grunting as Sam’s hand stalls around his tip.
“Can’t believe you got this hard ‘cause I was a little mean to you,” Sam says, tongue heavy in his mouth as his gaze hazes over with lust. He brings his head down towards his hand around Bucky before drooling right over Bucky’s tip so the glide of his hand up and down is eased by his saliva. Unable to resist, he gives the leaking slit of Bucky’s tip a kitten-like lick.
Bucky can’t seem to handle it; he jerks his hips up with a moan as Sam’s hot tongue makes contact with him. He’s leaking a ridiculous amount of pre as Sam plays with his shaft. Sam shushes his moans as his jerks get more frantic. Usually Sam would love it, hell, even encourage it, but if they were going to be subtle about this, Bucky would have to control himself.
“If you keep moving like that, Steve’s gonna look this way. Then I’ll have to stop.” Sam warns as he slows the pace of his hand, dragging down slower, teasing a complete stop as he fixes Bucky a stern look.
“No– please don’t–d–don't stop, I can’t,” Bucky whimpers, broken in his response. He’s trembling in his seat with his fists clenching and unclenching at his sides like he doesn’t know where to put them.
“If you’re good for me today, I’ll let you fuck me the next time we do this,” Sam picks up the pace again, “Only if you’re good. You’re leaking so much today. I’ll have to clean you up with my mouth today but next time you can spill as much as you want inside me.”
The man groans at the filthy line of words Sam spills into his ear. Sam’s panting himself at this point too. The feel of Bucky’s cock, the sound of Bucky's pleasure rings in his ear, it all makes it harder for him to control the pace of his strokes. He loses himself at the thought of Bucky inside of him the next time they’ll fuck. The sheer size of him would have Sam screaming if he’d buried himself inside Sam’s hole.
“Yes,” Bucky hisses as he fucks into Sam’s fist faster than before. He’s quickly losing control but it’s pure bliss for Sam to see him unravel at his hand. “Please, Sam– please, please, please–”
Sam matches his brutal pace with his hand, stroking faster as Bucky moans louder. They’ve both forgotten about trying to keep quiet but it's in the back of their heads, the secrecy of it making everything salaciously hotter than before. Bucky’s grunting right in his ear and Sam’s responding with his own moans.
“You can cum, Barnes, come on–” Sam breathes as he lowers his mouth right over Bucky’s cock. “I’ll take it all in my mouth.”
As soon as the heat of Sam’s mouth closes over Bucky’s cock he groans loudly, his hands finally leaving his sides to push Sam’s mouth further down his cock, forcing his face to nuzzle his pelvis. Just like that, Bucky spills into Sam’s mouth. And wow, Sam had figured supersoldiers had more cum to give but fuck, Bucky wouldn’t stop spilling into his mouth. His orgasm ripped through him as pulse after pulse of his cock left Sam swallowing down more and more of Bucky’s spunk.
“Shit–” Bucky hisses as he comes down from his high, shaking through the last few spurts of his orgasm. As he did, he let go of Sam’s head, allowing Sam to sit back up, wiping the last few traces of Bucky’s cum from the corner of his lips.
Sam watches, huffing through the lingering bits of excitement as he sits back up, leans his head against his seat and closes his eyes. He hears Bucky pull back up his pants as he huffs through the afterglow of the moment. He’s beyond exhausted; maybe he's not really built for backseat fucking like he used to do in college. In his mind, this was way less exhausting than the last time he remembered doing this.
“Bucky,” Sam asks tiredly, eyes still closed. “Is Steve on his way back to the car?”
The guy seems to hesitate a little, looking out of the windshield to where Steve and Sharon would be.
“Um, no. He’s…” Sam thinks he hears Bucky snort. “He’s making out with her right now, actually.”
At that, Sam shoots his eyes open. “No shit,” Sam whispers in awe.
The scene in front of him is as Bucky had said: Steve’s somehow managed to kiss Sharon and by the looks of it, Sharon had initiated and Steve was still figuring out where to put his hands. The bumbling supersoldier somehow managed to salvage the situation, finally kissing her back as she deserves. The second they pull away from each other, Steve's anxious eyes shoot right to the car where he finally meets their eyes. Sam and Bucky both try to appear as proud as possible and not at all winded from the mind-blowing orgasm Sam had just given Bucky. He finishes up his conversation with Sharon and makes his way back to the car.
“We keep what happened here between us?” Sam mumbles, only for Bucky’s ears to hear as he watches Steve come back to the car, pep in his step.
“Only if we get to do it again,” Bucky mumbles back right as Steve opens the door to the driver's seat. The promise in Bucky’s voice stirs leftover heat right in Sam’s lower stomach. It makes him itch for the next time they’d catch each other alone.
“Hey guys, sorry for the wait,” Steve says sheepishly, climbing into the car. He looks towards the back of the car, confused. “Sam, are you sitting at the back now? I thought…you’d be more comfortable in front with me?” he finishes worriedly, eyes flitting between Sam and Bucky.
“No,” Sam says with a bright smile. “I’m good back here with Bucky, isn’t that right?”
He finishes by looking at Bucky for approval, whose face is still flushed, props to his pasty white boy genes. He nods his head at Steve in agreement to Sam’s proclamation. Steve glances between them one last time in case either of them wants to move to the front but seeing them both settle in at the back puts him at enough ease to turn back around and keep driving, and they’re on their way again, Bucky less tense than before, Sam less annoyed than before, and both of them with a budding crush waiting to be acted on further.