Jar Of Dirt [Tony Stark x Peter Parker]

Addition: Filled

A/N: This chapter and the next one were written for a writing challenge on Tumblr. They're a continuation of the original story - but not much plot is included. It's straight-up smut, basically. We hope you'll enjoy it! <3
Warnings: breeding kink, slight choking (more like, Tony resting his hand on Peter's throat), daddy kink, dirty talk.

Tony and Peter are seated on the couch, the jar resting between Peter's crossed legs. He's bent over it, hugging it tightly and tilting his head to glance up at Tony's crooked smirk.
"Been a while, hasn't it?" The older man chuckles. Their sex had been so satisfying lately that they almost forgot about the jar. Peter, however, suggested they try something new again, feeling the pull of the little secretive pieces of paper grow stronger over time.
"Sure has," Peter says, biting his bottom lip. "Whose turn is it anyways?"
"I honestly don't remember, kid. Why don't you do the honors." Tony smiles and gestures at the jar before leaning back slightly.

There are still kinks in there that Tony would've felt uncomfortable about sharing before, but now that Peter occasionally wants to be his puppy, there's nothing Tony thinks would put his boyfriend off. Where Tony was nervous about the jar at first, he's more than comfortable now. Peter sits up straight and pushes his hand into the jar, rummaging aggressively before pulling out one of Tony's papers. He shows it off, wiggling his eyebrows and raising the tension, before unfolding it to read what's on it. Tony did not expect this response. Peter frowns. Suddenly, the pit in Tony's stomach that he thought would be gone forever is back. Does Peter not like what's on the paper?

"Well?" Tony asks, nervously sniffing his nose and sitting up again, shoulders tensed. "What's it say?"
"I, eh... I don't understand how this would work."
"Can't explain it if you don't tell me, Pete." The young man now turns the paper and shows off Tony's capitalized handwriting.

Breeding.

"You can't exactly breed me, I- I don't have a womb or anything." There's a beat. Tony stares at Peter wide-eyed before bursting into laughter, clutching his stomach as he falls back against the couch. Peter immediately sputters, putting the jar on the coffee table and raising his hands confused. "What? I don't!"
"After everything we've done in the bedroom, you draw the line here? You're not a dog either, yet your cock jolts at the mere idea of being my puppy."
"I know- I know-"
"Would you try it?" Peter's eyes are big and round, staring at Tony's squinting ones. It's quiet for a second.
"What should I expect?" Peter counters with a question of his own. Tony thinks for a little bit, pressing his lips on top of each other and looking at the ceiling, pondering. When he finally figures out what to say, he pulls Peter in his lap. The boy gasps at how hard his boyfriend already is.

"It's not exactly baby-making. It's more... Feral. Raw. An ultimate act of togetherness, binding us-" Tony presses a kiss on Peter's jaw. The boy angles his head to the side, exposing his neck more so the billionaire has better access. A soft moan escapes his lips, encouraging Tony to keep going. "It's about claiming you. Filling you up with my seed and keeping it there as a reminder to you that you're mine..."
"Yes," Peter sighs while pushing his crotch down into Tony's lap. "Yours." The slow, absent-minded roll of his hips is already turning into a gentle rut and he shifts slightly, trying to find the right angle to induce the most pleasure in both of them.
"I take it you want to try it?" Tony chuckles darkly.
"Mm, aren't we already doing it?" Peter's reply has Tony grasp his boyfriend's ass and squeeze hard. Peter yelps and pushes his face in the crook of Tony's neck.
"Cheeky little brat."

"Daddy," Peter whines softly, the vibrations of his voice rumbling through Tony's body from the neck where Peter's mouth is sucking at his skin to the tip of his cock.
"Oh, aren't you needy all of a sudden..." Tony can't help but tease, wanting his sub desperate before he fucks him. The delicious rub of Peter's crotch against his is making him growl. Peter's mouth travels up to Tony's sweet spot, right below his ear, where his jaw meets his skull. The boy licks and presses an open-mouthed kiss on the skin.
"Always needy for you-" Peter moans. "Need your touch, need your love, need your cock, I need it, daddy, please-"
"Hmm, beg so nicely," Tony purrs as his hands push Peter down into him further. "How about we take this to the bedroom?" Peter pulls back quickly to look Tony in the eye. His pupils are dilated with lust and he nods eagerly with his jaw slacked.