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Katsuki wakes up to soft, warm pleasure. He hums lightly as he rolls his hips up towards the mouth licking at his clit. It’s not unlike his husband to treat him with a surprise every once in a while, and he soaks up the gentle care in his sleepy haze.
A rough hand finds soft curls, busying itself at the scalp, not quite pushing, not quite resting either. Just gently massaging in time with the firm licks. He opens bleary eyes to see freckled skin buried in between his thighs, and the heat beginning to pool in his lower abdomen jumpstarts.
It’s nice just to watch, see how intently Izuku focuses on making him feel good. He feels his muscles relax into the warm touch, a welcome reprieve from the whole-body aches he’d been having before his nap. Izuku hums into his clit, still wetly kissing and licking. He feels the vibrations in his whole lower half, and Katsuki hums back, far more wantonly.
Izuku looks up from his task, warm light from a gap in the curtains illuminating his damp, grinning lips.
“Good morning, handsome,” Izuku greets, resting his chin in a palm. “How are you feeling?”
Katsuki groans, stretching tired shoulders and spine. “Hm, better. Less achy.”
“Good, I’m glad.” Izuku reaches over to hand Katsuki a glass of water from the bedside table, which he greedily accepts, gulping down the crisp, cold liquid.
When he turns to put the glass back on the table, he notices the towel beneath his bare hips. “How’d you manage to get my pants off and put a towel down without me noticing?”
Izuku lowers his head to lay on a muscular thigh, his eyelashes tickling the cornsilk colored hair when he blinks. “You were pretty out. I would’ve left you sleeping but you’d been out for a while and I was worried you’d feel worse for it. I thought it’d be a nice way to wake you up.”
“Mm it was,” he agrees. “Don’t stop on my account.” He grins lazily down, once again stroking through messy green curls, pushing them out of his husband’s face.
“Hm, greedy,” Izuku teases, kissing along the inside of the thigh he was resting on.
At that, Katsuki does push his head down, an equally teasing gesture that makes the other man laugh. Izuku makes his way along slowly, savoring more now that Katsuki is awake. The soft kisses along his inner thigh and hip paired with gentle massaging on the outside has him breathing heavily before Izuku even makes it back to his clit.
After an agonizingly long wait, he feels Izuku’s warm breath hovering, barely above the sensitive skin, and he fights not to raise his own hips into it. When he finally goes down, licking a long, firm, wet stripe, Katsuki releases a shuddering breath.
He sinks back into it, letting Izuku set a pace for him. His breathing starts to go ragged as the pressure builds. The feeling of needing more , more friction, more pressure, more anything , grows steadily too, until he’s all but panting in an effort not to grind into nothing. His thighs shake with the effort of keeping himself still, trying to make Izuku’s job easier for him.
“Zuku. Zuku please, hnng,” he pants, arching up off the bed.
Izuku hums a question, making him groan lewdly. He’s all but humping up onto his face now, panting and trying to find any friction, looking for anything to relieve the pressure.
“Please. Inside. Hhah ah, please. I need, mmmnnn.”
He can feel Izuku smile against him, one hand drifting from its place on his hip down to the heat between his thighs, one, then two thick fingers sliding gently in. He feels it as they curl upwards, dragging along his gspot with firm pressure. The pleasure shoots white hot along his spine, arching up with him like lightning.
Izuku goes back to kissing and licking, being sure to keep it in time with the slow strokes of his fingers. The combined stimulation has Katsuki all but writhing in the bed, chasing the full feeling as he grinds down on Izuku’s hand, trying to take him deeper, more fully.
“Yes Zuku, please, more.” The pleasure just keeps building, higher and higher, but not what he needs . He craves so desperately to be full . To be filled .
He grinds down harder, clenching around the crooked fingers to try and fill that need. Harder, deeper, more.
Izuku pulls his face away to look up at him, pupils blown out and lids hazy. “Kacchan I can’t move my fingers when you do that,” he gently coaxes. “I need you to relax.”
Katsuki feels on the verge of tears, both from the overwhelming onslaught of sensation and from his inability to get what he needs like this. It feels so good but it’s not what he needs right now.
He looks into his husband’s face, still wet down the chin with saliva and a bit red with blood now that he’s being penetrated too. He’s still rocking his hips onto the fingers inside him, desperate to keep the good sensations going. The look on his face is pleading as he works out “I need more Zuku. I need you to fill me. Fuck, Zuku, put a baby in me, please . I wanna be so fucking full of you.”
Izuku breathes a small laugh, working him harder with his hand, making sure his palm rubs across the sensitive clit as his fingers slide out and push back in. “Kacchan, I don’t know if I’ll be able to do that right now.”
“Fuck, not with at attitude, come on.” He’s well aware he’s being whiny, but he’s so far beyond caring. It goes further than horny, further than baby fever. It’s a carnal need to be bred like he’s in heat. “Just fucking try, Zuku, please.”
“You know that means I have to take my fingers out, right?” At that Katsuki clenches harder, tears pricking at his eyes.
“Fucking, just take your clothes off and get inside me. I need you.”
Izuku smiles up at him, kisses him gently on the thigh again, and slowly takes his fingers out. It’s near painful to have them taken away, and he involuntarily chases with his hips. With a gasping, stuttering whine he lets them free, panting as he tries to calm down from the intensity.
He watches as Izuku wipes the dark blood on their throw away towel, cleaning his hand before pulling his shirt over his head. Katsuki’s mouth waters against his will while Izuku unbuckles his belt, and unbuttons his jeans. It all comes off in one smooth motion, gracing Katsuki with the gift of efficiency in his dire time.
Izuku gives him a meaningful look, making sure he has Katsuki’s full attention. “Are you 100% sure you don’t want me to put on a condom?”
Katsuki could laugh if he wasn’t about two seconds from pouncing on the nerd himself. They’d been talking about starting a family for a while now. They’d done all the research there was to do. They had a nice nest egg in the bank. But his heart swells nonetheless at his husband’s care for his comfort. Being given more than enough space to voice what he consents to and what he doesn’t.
He shakes his head adamantly and grabs Izuku by the back of the neck. “No condom,” he pants out, meeting the intense stare head on. “I want you to pump me so full of cum it goes straight into my ovaries.”
Izuku surges in, kissing him deeply. They pant into each other’s mouths, trying and mostly failing to keep kissing while Izuku hikes one of Katsuki’s ankles up onto a shoulder. Katsuki watches as Izuku, one hand on the headboard above him, one hand on his own cock, guides himself to Katsuki’s entrance, painstakingly slowly pushing himself inside.
The stretch stings only a little, a side effect of period sex he wishes he didn’t have to deal with. “Fuck, Izuku put it all the way in already.”
Izuku is panting now too, the exertion of keeping himself under control mixing dangerously with the hot, tight, and wet feeling inside Kacchan’s pussy. “I gotta go slow right now or it’s gonna hurt, Kacchan. I want this to feel good for you.”
His breaths come out labored as he waits for Izuku to bottom out inside him. The pain of waiting and anticipating almost outweighs the horrible sting he knows he’d feel if he forced it all in at once. When Izuku finally pushes the rest of the way inside, they both sigh, slumping their foreheads together, just being still for a moment while Katsuki adjusts.
The sensation is almost enough to alleviate the ache, but the tight feeling at his entrance in direct comparison to the loose, inviting feeling along the rest of the length has him hot and writhing with barely enough time for his rim to relax around Izuku. He starts grinding himself down, letting his body adjust while getting some much needed friction.
When he feels Izuku start to move with him, though, he can’t hold on anymore. He wraps his legs tighter around Izuku, pulling his body closer in to try and gain leverage.
“Hah, harder Izuku, please, you can go harder,” he pants out, still searching for the stuffed feeling his body craves.
Izuku shifts, hiking his knee further up onto his shoulder, spreading Katsuki’s legs to get deeper inside. They start at an even pace, the rhythmic slap of skin on skin, Izuku’s heavy breathing, and the breathy moans punched out of Katsuki with every thrust the only sounds in the room. Izuku pumps hard into him, drawing back slowly before snapping their hips back together again.
Steadily they increase pace, the slow beat becoming more and more frequent and making Katsuki less and less coherent. He starts muttering his praises and his wants, a habit he long since picked up from Izuku. Between moans pulled from his very soul and trying to catch his breath, he finds himself begging for more again.
“Fuck, Izuku I know you can go deeper than that come on. I need all of you, please, fuck ,” he breathes out. “Please, I want your baby in me so bad. Give me all your kids Zuku, I need it.”
He feels his husband shudder out a breath by his ear, his hips stuttering a little like the thought of filling Katsuki with cum has him close already. Finally , Izuku starts pumping into him like he’s carving out his own place inside Katsuki’s pussy, deep, hard thrusts coming at a near brutal pace now.
Katsuki digs his nails into his back to try and pull him closer, or ground himself, or merge the two. He’s not sure. All he knows is that he’s never felt so full and yet so empty. He can feel all of Izuku, dragging his full length out before slamming it back in again, but that’s not the only kind of full he needs.
He wants Izuku to cum deep inside his womb, fill his bleeding uterus like a goddamn balloon, and then keep pumping it in. He wants to be so full of Izuku’s DNA that it rewrites his own, forever making a home in his body. He wants there to be no way that he doesn’t get pregnant from this, sending the sperm straight to his own eggs.
As he feels himself get closer, the white hot pressure in his cunt becoming almost unbearable, he feels Izuku’s rhythm start to falter too. They pant in sync with each other, hardly able to do more than breathe and grunt with the effort of holding themselves together. Katsuki pulls Izuku’s head towards his mouth and breathes out between pants “Fuck, Zuku you feel so good. Cum for me Zuku, come on.”
With a last strangled moan, Izuku’s hips jerk wildly before stuttering and releasing ropes of the beautiful hot liquid to mix with Katsuki’s own. The sensation of the sudden warmth and the sound of Izuku’s keens as he milks himself dry inside Katsuki is enough to send him over the edge too, vision whiting out and feet going numb from the sudden release. Izuku cries out at the clenching around his now sensitive cock, dutifully pumping the cum deeper into Katsuki while he fucks him through the orgasm. It hits Katsuki in waves, jolting his entire body with the force each time it hits.
When they both finally come down, Katsuki smiles up at his husband, green curls plastered to his forehead and along the sides of his face. Izuku smiles back, a crooked thing with eyes half lidded and fucked out. They spend minutes or hours staring into each other’s eyes, catching their breath, basking in the post-sex haze that settled over them.
When Izuku moves to take his now half-hard cock out, though, Katsuki’s hand shoots out to grab his arm. “What are you doing?” he asks, almost panicked.
“I was gonna clean us up, Kacchan. It’s okay, I’ll be back.”
“Wait.” Katsuki isn’t sure why the thought of Izuku pulling out makes him want to cry, but he hopes beyond hope that he can get the message across with his eyes. He has too few words in his muddled brain to express it all right now.
But Izuku seems to understand, slowly easing himself back over Katsuki, gently brushing damp hair from his face with a soft smile. “Okay Kacchan. We can stay like this a while.”
He feels his body relax again, comfortable with the cum sitting inside him, held in place by his husband blocking the way out. The only way to move is in, fuckers. Be smart like your dad and find where you’re supposed to go, he thinks to himself.
He pulls Izuku down for a slow kiss, savoring their shared afterglow, and guides him to lay on top of him. Human weighted blanket in place, he finds his eyes getting heavy once again. Maybe another nap can’t hurt.
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About three weeks later…
Izuku throws the kitchen towel over a shoulder, about to clean up from dinner. Katsuki made spicy curry as a surprise for him, and, despite his husband’s insistence at cleaning up with him, Izuku gets started while he’s in the bathroom. A small way of saying I see what you’re doing to make my life easier, so let me do the same for you.
He busies himself with the monotonous task, letting himself fall into a rhythm of rinsing, scrubbing, rinsing again, and setting the dish aside to be dried. As he does, he lets his mind wander, drifting to work, the book he’s reading, the movie they rented that they’re planning to watch tonight. It’s an action movie they’d never heard of, not part of any franchises they keep up with, but they figured they’d give it a shot.
He’s ripped from his thoughts when he hears a bellow from down the hall, Katsuki yelling “Izuku! Get in here!”
“Coming Kacchan! Just a second!” He yells back as he hurriedly rinses his hands off and dries them.
He’s down the hall in a rush, knocking his shoulder against the corner on the way. He barely knocks on the door to let Katsuki know he’s coming in before he’s pushing the door open, a worried look pinching his eyebrows together.
“Hey, what’s wrong? Is everything okay?”
Katsuki stands there for a moment, a wide-eyed, almost awed expression doing nothing to satiate Izuku’s nerves.
“Izuku,” he breathes out.
“Are you feeling okay? What happened?” Izuku tries again, still not sure what exactly is going on.
A small, almost timid smile creeps onto Katsuki’s face. “We did it.”
Izuku’s worry turns to confusion until he sees it out of the corner of his vision. A small, white stick on the counter. The box next to it.
He rips his gaze from the pregnancy test to meet his love’s eyes again, a matching look of trepidatious hope blooming, questioning. It’s like the air is knocked out of his lungs, time stopping, the world narrowing around their little guest bathroom.
“We did it?” He echos, a question this time.
He sees the tears prick at Katsuki’s eyes as he smiles, nodding.
“Zuku I’m pregnant.”
Izuku practically leaps into his husband’s arms, probably knocking limbs on walls, but not paying any mind to the cramped space.
“Kacchan, oh my god! That’s amazing!” He pulls away just far enough to kiss him deeply. “You’re amazing, Kacchan.”
Katsuki looks up at him, teasing. “And you said it couldn’t be done,” he snarks, a goofy little smile still clinging to his lips.
“All I said was that I wasn’t sure it would work.”
“Yeah, and I said try harder.”
“And I did try harder! And here we are!”
Katsuki kisses him slowly, resting their foreheads together.
“And here we are.”