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Peter groans when he shifts in Tony’s lap, trying to get more comfortable. This is the third load he’s taken since Tony pulled him onto his knot that morning and didn’t let him off after. What started out as Peter trying to tease Tony by sinking down on his cock and proceeding to sit completely still in retaliation for the fact that Tony refused to give him any attention, has now evolved into something much more.
It’s been over an hour since Tony first knotted him. But instead of allowing it to deflate to let Peter go, Tony rocked into him when it seemed they were about to part, effectively keeping them locked together for a little while longer.
And initially it seemed silly. Just a little bit of fun.
But on the third load, Peter is starting to realize that Tony is serious about this.
So serious, that when Peter groans about getting hungry, Tony simply gets up from the couch with Peter still firmly seated on his big knot, and walks into the kitchen to grab the both of them something for lunch.
While they eat, Tony’s still inside of him. They lean against the kitchen counter, and Tony strokes Peter’s cock slowly when he’s finished his sandwich, kissing at his neck.
“How much longer until you’re satisfied?” Peter asks curiously.
He can feel Tony smile against the crook of his neck.
“Until I’m satisfied, baby.”
It’s not an answer, but it’s exhilarating. Peter sees the potential now. The possibilities. He can sense the consequences.
It thrills him.
Tony pumps a fourth load into him right there in the kitchen, and Peter rubs a satisfied hand over his belly. It’s nothing noticeable, not yet, but that doesn’t matter. What matters is that soon, he’ll see exactly what this is doing to him. They’re only three hours in, and they have many to go.
That’s a whole lot of cum.
Tony works throughout the day. Peter isn’t even sure how he does it half the time, because after a few hours he’s already getting very oversensitive himself, and he can only imagine how Tony must be feeling. And yet he seems to be doing perfectly fine, balancing his laptop on Peter’s back, even taking him down to the workshop to talk through something with FRIDAY for a little while and try and work on some new designs.
Peter is hard throughout most of the day. Sometimes Tony strokes him to completion, sometimes he tells him he’s not allowed to because “we don’t want your spunk absolutely everywhere, do we? At least mine’s perfectly contained”. And fuck, it really is.
Peter has never felt so big before. Tony unleashes load upon load on his poor insides until his belly is distended and he’s starting to feel a little bit full. It doesn’t get uncomfortable until the 24 hours Tony ends up keeping him trapped on his knot are almost up, but it certainly doesn’t help that after a while, Peter can feel Tony shift in his seat beneath him with what he guesses has to be slight discomfort.
Peter asks what’s wrong, and he almost wishes he hadn’t.
“Gotta take a leak,” Tony murmurs behind him.
Peter goes very still. He realizes that with the way they’re sitting most of the time, he has to be sitting pretty much right on top of Tony’s bladder.
Tony already carried him into the bathroom when he had to go, standing them over the toilet bowl and jerking him off slowly after Peter had relieved himself. The orgasm had been intense, and Tony had to carry back a limp, satisfied knotwarmer.
But now it’s Tony’s turn.
And Peter knows that Tony isn’t about to break his streak.
Peter feels Tony press kisses up the top of his spine, over the back of his neck, until he nuzzles into Peter’s hair. His hand has snaked toward Peter’s front, and it’s smoothing over Peter’s full belly from side to side.
“You can take it, can’t you baby?” He purrs.
Peter’s cock stirs between his legs at the mere notion.
He’s not sure he can. He already feels so full, his belly is already starting to show just how full it is, rounding out beautifully with Tony’s cum. But does he really have another option?
Peter nods wordlessly while Tony’s hands move up and down his hips, over his back, caressing wherever they could reach. He’s trying to help him relax – help the both of them relax – yet Peter can’t help but be a bit tense with anticipation.
He doesn’t feel it at first.
It starts out as a gentle trickle, paired with a soft sigh from Tony’s lips.
But then it comes, properly. Peter’s breath hitches at the warmth first, then the feeling of it spraying against his inner walls as Tony lets go. It almost tickles, but in the most pleasant of ways. And then it’s the amount that’s piling up. Tony doesn’t stop, it’s like it just keeps coming, filling him up more and more until his belly is straining with Tony’s hot piss and he’s squirming uncomfortably.
“There you go,” Tony breathes praise into his ear, “Such a good boy. Almost done.”
Tony’s cock jumps inside Peter and releases some more, and it’s both too much and yet not enough all at once. Peter still wants more, and more, and more.
He moves his hand over his belly and finds it’s shaped into a proper bump now, as if he’s carrying, and showing for all the world to see. And surely after this is over, with how much cum Peter has been carrying around and how long for, some of it must have taken. Peter can only hope.
Tony rubs him off quickly and his orgasm intensifies the strain on his big belly, but it’s wonderful. And they’re not even done yet.
After that, Tony continues on with his day as if nothing ever happened.
Every load he puts into Peter after that feels like torture. His belly is getting bigger and bigger, stretching beyond what Peter thought was possible, and yet there is nowhere he would rather be than right on his mate’s knot.
At night, Peter can’t eat. He feels too full. Tony tries to feed him a couple of bites but he nearly cries when it only adds to the pressure already on his body.
Tony fucks him up against the shower wall before bed, properly, his big cock not allowing for anything to spill out. He knots Peter again and carries the now almost delirious boy to bed.
They move around the room to get ready to sleep, and when they approach the bed Peter can practically weep, knowing that it’s almost over. They’re almost done, and then once he’s free he can wobble to the bathroom and release all of the cum and piss Tony put in him throughout the way, and go to bed beyond sated.
Little does he know that is not what Tony has in mind.
He bends Peter over the edge of the bed and he slowly starts pulling out. But just when his knot pops and Peter makes an obscene noise of premature relief into the bedsheets, Tony is quick to replace his cock with a large plug.
Peter squirms and cries until it’s in. No wonder – it’s ever so slightly larger than Tony’s inflated knot.
“I can’t,” Peter babbles, pleads, “Please, Alpha, I can’t take any more. Please, I need to let it out, it’s too much.”
Tony climbs into the bed and presses a quick kiss to the top of Peter’s head before he settles in comfortably under the blankets. He’s never had such a satisfying day before. What started out with Peter being an absolute tease, now ends with a very happy and fulfilled Tony, and a Peter who has finally learnt his lesson. Or so Tony hopes.
He pats the mattress next to him in invitation.
“Now, now, Petey. Don’t underestimate yourself. You’ll see, when we continue where we left off tomorrow, you’ll already be able to take so much more.”