Tony laughs with all his might, rolling waves of joy and uncontrollable fervor. His body bends over like origami—there's something beautiful in the folds where he can't catch his breath.
Steve watches him, how he tries to grab at Peter to get him to stop talking, "kid, shut up or I'm gonna piss myself—seriously!", but Peter is as fixated on his joke as he is mischievous, delighting in the unencumbered laughter he's pulling from Tony.
This is Steve's favourite joke. Not that he heard it considering he just walked in, or could understand it if he did (Tony keeps chuckling over the word 'tachyons'), but anything that makes his boyfriend light up like a million lumens is positively the greatest thing in the world.
He wants this. Wants Tony this happy, Peter this excited, wants a family. This family.
"I wish I could get you pregnant."
The entire room freezes. Steve is probably the most shocked of all by his own words, but Peter and Tony pause their chuckling and immediately set their laser focus on him.
It's too late to explain himself. Peter and Tony look at each other, and in the next moment they're both falling over each other in laughter.
"I'm actually gonna piss—"
Peter cuts Tony off with such a raucous guffaw that Steve's concerned the boy is about the cough up a lung.
Tony curls into a little ball on the floor with his head buried in his knees, entire body shaking with laughter so hard that he's gone silent. Peter falls to the ground as well, forehead pressing against the concrete and smacking his hand against the flat surface.
Peter starts giggling even harder at his own words that Steve can't help but join in on the ridiculousness.
The red flush of Peter's face becomes as hilarious as it is concerning, and Steve's sure him and Peter both could colour match a ripe tomato. If Tony's quiet is any indication, he's probably blue from lack of oxygen. All the laughter is coming out, none of the air in. If Steve wasn't so consumed with adoration and joy he'd be concerned.
Once Tony is able to curb his suffocation he blooms like a rose; opening up and falling onto his back, limbs splaying out as remnants of laughter slip from his pink petal lips.
"Ah, you amuse me Rogers."Steve can't help but grin back at the man, elated and proud.
"Well, at least I'm capable of that."
Tony giggles softly, unerasable smile soaking Steve in its warmth. He reaches a hand out for Steve to help him up.
"I wouldn't count yourself out so fast. I'd like to try this whole impregnation thing. Maybe if we keep practicing it'll take," Tony conspires, instead using Steve's unsuspecting hand to tug him down and on top of him on the floor.
"Oof—oh," the large man catches himself with his forearms before he can crush the body under him, hovering there as Tony leans up to rub their noses together.
Not that he'd say it out loud, but Tony really reminds him of a cat sometimes. Prickly, beautiful, and the sweetest little thing when they actually like you. Steve smiles privately at the thought and the affectionate touch.
"Ew, PDA!"Peter shouts in offense.
Steve tries to move back but Tony grabs the back of his neck, pulling him into a kiss that Steve falls all too easily into.
"Ugh, you guys are so gross. Romance ruins everything."
The sound of Peter's fading footsteps plays in the background of Steve's mind, too focused on the pleasant hand running through his hair and tongue licking into his mouth.
"FRIDAY, lockdown the lab," Tony whispers against his lips.
Steve pulls back far enough to raise an eyebrow.
"What? You're the one who wants to get me pregnant."
"I didn't mean right now—no, I didn't mean it at all, obviously. That's impossible. I just..."
"Well I mean right now. Maybe we'll revisit the whole kids thing when we're sure I can't have my own. First we gotta test that theory though," he smirks and pulls Steve back into a kiss.
Yeah, Steve doesn't mind a little hands on experimentation. Tony is always so smart.