Thread by @pockyhucks

back on the breeding kink bullshit

//cws #kiribaku, #nsfw, poor kink negotiation, somno, little mommy kink, kirishima and his massive breeding kink

Katsuki isnt stupid.

Not when it comes to Eijirou.

Ei is funny, sometimes, because he thinks he’s sneaky. Like a six and a half foot walking rock can be anything /nearing/ subtle.

He doesn’t try it often—closer to never—but Katsuki doesn’t have to be observant to know when Ei is hiding something.

Though sometimes it takes him a minute to figure out what the issue is.

See, they fuck a /lot./ And often. Katsuki likes to go and go and go until he can’t move, and Eijirou has the stamina to ride it out, fucking him until Katsuki is sweaty and filthy and pumped full of cum.

But he starts to notice that Ei always... lingers after he’s done. Not in a curl up besides Katsuki and cuddle kind of way—that’s normal and will end up happening anyway.

But Ei fucks Katsuki and then lays him on his back, presses his hand over his stomach and his thighs and

looks desperate to say something.

“Spit it out,” Katsuki will rasp, and Eijirou will smile, shake his head, and grind his cum deeper into Katsuki with his already softening cock.

Hands up his stomach, over his chest, until Eijirou is satisfied enough to lean down and leave a parting kiss under Katsuki’s naval.

It happens like that for /weeks,/ drives Katsuki near out of his dome trying to figure out where the hell Eijirou goes with his hazy eyes and his

wandering hands.

And then the dreams start.

Katsuki is a light sleeper and Eijirou is a much, much, heavier one, so he’s not unprepared when Ei inevitably starts mumbling in his sleep.

Little things, usually, like asking for Katsuki, or ordering food, or wondering where all his shoes have gone.

He always wakes Katsuki up though, tossing and turning.

What he’s not expecting is the night he wakes up plastered to Eijirou’s chest, his boyfriend squeezing his waist and mumbling, “Baby. Lemme give you a baby. Katsu...ki.”

Which is. Hmm. New.

—

“Katsuki, /Katsuki—/“

This is the third time Ei has woken him up this week. Katsuki would be mad if he weren’t more excited about it.

“Oh fuckkk, mommy... nn... /baby./”

Katsuki is backed up against Eijirou’s chest, curling in around himself instinctively.

He woke up with Eijirou holding him so hard by the hip he worried about bruises for a split second, before Eijirou was slipping his leg between Katsuki’s thighs, pressing the hard line of

his cock against Katsuki’s lower back.

Eijirou makes this sound, half sleepy and hot against the back of Katsuki’s neck when he pulls his back against his hips again.

“Fuck,” he breathes, and shifts, and Katsuki gives a tentative rock against the thigh between his legs.

“Y’ gotta... mmm... y’ gotta take it all, alright, baby? g’na cum so deep...”

Katsuki’s cock drools in his boxers, hips rutting frustrating and gentle against Eijirou’s leg. He’s so /quiet/ like this, his voice barely carrying over the loud shifting of bedsheets when Katsuki

squirms.

Katsuki feels engulfed and smothered, swallowing a moan when Eijirou’s hands start to wander like they /always/ do, crawling towards his belly over his clothes. “...mmmh,” he sighs. “Gonna be good for me, mommy?”

This time Katsuki /does/ moan, caught barely by the hand he slaps over his mouth, turning to bury his head in his pillows with flaming cheeks.

Eijirou’s breath picks up in his ears, tapers off into a whine as he ruts against Katsuki’s ass.

“Such a g-good mommy for me. Katsuki, /hnnn/ Katsuki ‘m gonna fuck you pregnant, baby, hold on—“

Eijirou jerks his hips against him /hard,/ his voice breaking into a breathless keen as Katsuki squeezes his eyes shut.

He feels /hot,/ aching for Ei to fill him up, fuck him /full/ but he knows if he wakes Ei up right now he’ll be too embarrassed to do anything other than sputter uselessly.

Ei’s hips keep moving in these crude little jerks, helped by the firm hand low on Katsuki’s stomach that

have Katsuki rocking in place, breathing hard as Eijirou pants in his ear. And he keeps fucking whispering, “Mommy, my good mommy,” like it’s not driving Katsuki up the fucking wall.

“Wanna put a baby in you,” he groans, and Katsuki’s head is swimming, his cock twitching

and unstimulated against his hip. “Fill you up with cum, d-don’t let any out—“

“Shit, Eijirou,” Katsuki whines, muffled into his hand.

“Oh, please,” Eijirou murmurs, and Katsuki feels his cock nestle between his ass. “Please, please, g’na knock you up—“

Katsuki gasps when Eijirou cums, his body pressing tight to Katsuki’s and breath puffing out in a satisfied groan. The Katsuki of Eijirou’s dreams must be taking it well, based on the way he strokes Katsuki’s skin, coos, “That’s it, mommy.”

And in the morning, when Eijirou wakes up to Katsuki sliding down onto his cock, dark circles under his eyes hand on his belly, well, he just has to hope Ei is a little less perceptive than he should be.