Steve reclines against the pillows on Peter's bed, watching Tony Stark gently undress the younger man. Peter's robe falls to the floor in a delicate puddle, and Tony instructs him to bend over, showing Steve the plug he's been wearing. Peter quickly obliges, spreading his legs and bending himself over the back of the chair that Tony had been sitting on. Steve leans forward to get a closer look, and sure enough, he can see the pink glint of a jewel between Peter's round cheeks.

"Peter, why don't you tell our guest what it is that you want tonight?" Tony instructs him, a voice a low command, circling the younger man. He gets down on his knees between Peter's legs and gently twists the plug, eliciting a moan.

"Want to suck him, want him to fuck me…" Peter whispers, not trusting his voice not to break from the tension. But Tony's having none of that.

"Sorry? Didn't quite catch that. And I don't think our guest did either." he turns back to look at Steve, who has now completely disrobed and is lazily stroking his slowly hardening cock.

"I want to suck him, and I want him to fuck me!" Peter repeats, desperate for more contact now. Tony chuckles.

"Well, I think that can certainly be arranged." He gestures for Steve to get up and join him next to Peter, which the super soldier does without question. They kneel down together behind Peter.

"Do you see how nicely his hole swallows the plug, how greedy it is?" Tony asks, gently toying with the exposed piece of the toy, savoring every whimper that comes out of Peter's mouth. All Steve can do is nod.

"Go ahead, you can touch him."

Steve feels as though this must be a test, but Tony is looking at him in such a way that he feels like he can genuinely trust the situation. Tentatively, he lets his fingers land on the plug, applying pressure.

"Please," Peter gasps, his hands trembling on the desk. They've barely done anything, his cock hasn't even been touched yet, and he's already fully hard, ready to be fucked, ready to fuck, dammit, anything.

"Please 'what', Peter?" Steve asks, feeling bold. "What do you need?"

What does he need? Fucking anything right now. But he settles on, "please use your mouth."

"Well, you heard the kid, Rogers," Tony smirks. "Better get to it." And without warning, he pulls the plug from Peter's ass.

For the rest of his life, Peter will deny that he made the yelp he did when Steve's tongue breached his asshole, but Tony and Steve know the truth. His knees nearly buckle at the onslaught, and Tony has to steady him. Now they know why Bucky has been walking around with such a smile on his face lately.

Steve is relentless with his tongue, when he finds a spot that makes Peter cry out, he stays there, working it until he doesn't think Peter can take anymore. He feels something drip onto his thigh and notices that the kid's cock is leaking precum like a faucet.

"Turn around," he gasps, coming up for air. Peter's hole is slick enough that Steve is able to slide two fingers into it easily, not wanting to stop giving it attention as he wraps his mouth around his cock.

"Don't let him cum yet." Tony's stern voice comes from the bed, where he has taken all of his clothes off and is reclining where Steve was, enjoying the show. "He doesn't get to cum until you say so." Peter bites his lip, obviously close to the edge already.

"I don't want to dictate how you do this," Tony adds, with a tone that clearly implies that he's about to make a suggestion. "But why don't you make him work on that super soldier cock for a while? His mouth looks like it needs something to do."

Steve can't really argue with that, so he gets to his feet. Feeling bold, Peter takes control for the moment and places his hand in the center of the taller man's chest, pushing him back towards the bed. Once Steve is on his back, Peter crawls all over him, exploring every inch of his muscular torso.

He hasn't given Steve's dick the attention it deserves thus far, so when he finally is face to face with it, his mouth goes dry at the size. It's at least nine inches long, if not more, he knows because he has a toy that's that size and he's only just been able to fit that all the way inside of himself. And that's not to mention the girth. His fingers fit around it, but just barely.

"I guess that serum didn't just work on your muscles, huh Cap?" Peter grins, looking up at him. Steve smirks. He knows his dick is huge, but to perfectly honest with himself, this is only the slightest improvement over how big it was before the procedure. What can he say, he's just always been gifted.

Peter wraps his lips around the head and Steve sighs contentedly as he gets to work. While Bucky is fast and sloppy with his blowjobs, Peter seems to take a different tactic altogether, teasing him slowly, licking long stripes from the base to the tip, and always keeping Steve on his toes. Everytime Steve thinks he's about to cum, Peter pulls back, switching to a different technique. He glances over at Tony who gives him a knowing look and whispers, "kid's a fucking god at this." Then he says a little louder, "think this is what you were born to do, Petey-Boy."

Peter moans around Steve's shaft, the vibrations causing Steve to shiver. If there's nothing else Peter absolutely loves it's when Tony tries to humiliate and degrade him.

"I bet you would do just about anything for us right now, wouldn't you Peter?" he asks. "I could bend you over in the middle of the lab and have my way with you. Leave you blindfolded and tied up, a little note on your back letting anyone else know that you're theirs to use as well?" Peter ruts into the bedspread, trying to get more friction on his cock. He's a slut at heart and they both know it. And now Steve does too.

"Maybe Steve here isn't the only one I should share you with, hmm?" Tony asks, pulling him off of the super soldier's cock. He wants to watch Steve fuck Peter, and he's getting impatient. He nods towards the bedside table where the condoms and lube are kept and Steve gets the idea immediately, prepping himself while Tony continues to whisper to Peter, getting him into position. "Is there anyone else we should invite back to your bedroom?"

Peter groans and Tony knows immediately that there definitely are a few other people that Peter's been thinking about lately. A wolfish smile breaks across his face and he kisses his boyfriend, watching Steve get into position behind him, rubbing lube onto his cock.

"That's what I thought, princess. We are going to have so much fun."

Steve presses into Peter slowly and Peter almost has to bite a pillow to keep from crying out. But Steve takes his time, not wanting to rush anything. Peter's ass is like a fucking vice and while he's partially going at a snail's pace for Peter's benefit, he also knows that if he goes any faster than this he's going to blow way too fast, and he wants to last as long in this as he possibly can.

Tony gives the two of them a minute to find their rhythm before positioning himself in front of Peter, standing in front of the bed, his dick at the perfect height for Peter to take him in his mouth. Steve is moving faster now, feeling more and more comfortable, enough to start talking to Peter with a mouth that makes Tony proud.

"You like having two big dicks inside of you at once, kid?" Steve pants, making eye contact with Tony. "You like feeling full like this?" Peter hums affirmatively, nearly gagging on Tony's cock, who is fucking his face in earnest now.

"I bet you'd love to get this every night, now wouldn't you?" he smirks at Tony, who gives Steve a look of don't get cocky now, Rogers. Steve silently wonders if Tony would let him borrow Peter for a night with himself and Bucky, and his cock grows harder at the thought, if that's even possible at this point. The idea of Peter subbing for the two of them…

The two men can tell that Peter is close, but then, he's been close for a while now. And with Steve's long member hitting his prostate with every stroke, he really doesn't know how much longer he can hold out. Feeling Peter's hole clench tighter around him, Steve knows it won't be long.

"Are you getting close, princess?" Peter moans desperately around the cock in his mouth, and goes to reach for his own, but Steve bats his hand away, wanting to get Peter off himself. It only takes a few strokes, and Peter is spilling all over Steve's hand, shuddering, practically collapsing onto the bed. Steve follows quickly after, a grunt of "fuck- Peter!" escaping his lips as he unloads himself into Peter's hot tightness.

It doesn't take long for Tony to finish also, pulling himself from Peter's mouth to paint his face with cum, Peter holding his tongue out, not wanting to miss a single drop.

The three of them collapse onto the bed, still breathing hard. Peter is the first to speak.

"Well, damn, that was the best birthday gift I've ever received." Tony chuckles and rolls his eyes.

"Geez, kid, I hope not, that suit I got you is Giorgio Armani."

Steve has to hold back a snort of laughter and he rolls over to kiss Peter tenderly. The first time he's kissed him tonight, he realizes. Peter seems almost surprised at first, but he melts into the kiss quickly.

"I really, really, enjoyed this." he pulls away to say, unable to stop smiling. "Tone, can Steve join us again sometime, were you serious about that?"

Tony shrugs, genuinely feeling no jealousy in the moment, only wanting to keep Peter smiling like that.

"If that's something that you want, and it's something Steve wants too, then I have no problems with it."

The two of them share a kiss, basking in the moment. Peter only has one question left.

"Wait, who's Giorgio Armani?"