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English
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Published:
2025-12-27
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1,624
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1/1
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Oxytocin

Summary:

Jack admires all the ways getting Robby pregnant has improved both of their lives.

Notes:

This was inspired by a post someone made on tumblr (hatchet-boy)

(See the end of the work for more notes.)

Work Text:

It wasn’t therapy, but when Robby found out he was pregnant, it was the next best thing. It had to be a change in hormones, some kind of flush of dopamine or serotonin that filled the gaps his brain had been sorely missing the whole time anyway.

It’s not that it cured him, but it certainly did a whole lot of something.

Whatever it is, Jack’s here for it. So fucking here for it.

12 Weeks:

Robby, formerly self-conscious about his tummy? Suddenly the taller man is constantly checking his ‘bump’ in the mirror. “Do you think it’s grown at all? Here, come feel Jack. My bump’s gotten bigger, right?”

Jack places his hands on Robby’s cute as hell little bump. Robby asked him the same question yesterday, shirt lifted as he gazed with heart-eyes into the bedroom mirror. Jack doesn’t think the bump has gotten bigger in the last 24 hours, but he enjoys getting to fill his hands with his husband’s belly without the other man shying away like usual, gently batting his hands away. Now Jack gets to run his fingers over the soft tufts of hair on said belly. He wants to press kisses to the steadily growing bump but doesn’t want to push his luck just yet….

“Yeah, baby, I think it has,” Jack says, smiling and watching the light in Robby’s eyes glow brighter as he stares at his own stomach.

20 weeks:

Robby has gotten so horny Jack considers popping a viagra just to keep up. Robby wants it everywhere. Anywhere. All the time.

The kitchen counter. The back of the couch. The foyer where Jack has to scramble just to get the door closed so the whole world doesn’t see his husband’s naked body because Robby can’t wait another second and starts yanking his pants down and reaching for Jack’s. In the car in the parking garage after work. In the car in the parking garage before work. It’s actually a miracle if they get to fuck in an actual bed anymore.

“Oh, fu- fuck Jack. Fuck me harder. Yes, yes, like that! Breed me. Put another pup in me. Pleaaaase, Jack.”

Jack fucks into Robby for the third time that day, taking him from behind this time. He fucks into Robby’s dripping hole, his hands holding onto the rounded belly of his husband as he pounds away.

Sweat slicks his forehead as Robby slams his hips back into Jack’s, taking him in deeper and deeper. Robby has started gaining weight on other parts of his body - including his ass. Mesmerized, Jack watches as Robby’s soft, rounded flesh ripples and bounces as it slams against Jack’s groin. Purpling bruises mottle the normally pale flesh from where Jack hasn’t been able to keep from sinking his teeth into it on numerous occasions before slipping his tongue into the man’s hot, slick hole.

A low keen brings Jack back to reality, pulling his eyes from his husband’s gorgeous ass. “Jack?” Robby whines, desperate to hear his husband who’s gone quiet except for his sharp breaths.

Moving his hand to Robby’s ample hip, he gives it a squeeze. “Yeah, baby. You’re doing so fucking well taking my cock. Feel so good. Your hole squeezing me so tight, baby.”

Robby moans happily at the praise, his back arching further in response.

“Wanna be so good for you Jack. Wanna take your cum. Wanna be filled with you. Wanna make you so many fucking babies.”

Jack groans. It’s the third time having sex today and he’s already getting close to the edge. Yeah, he’s gonna have to figure out how to keep up, how to keep his husband’s hole filled. It’s a problem Jack doesn’t mind having in the least.

29 Weeks:

“I think we should go to therapy.”

Jack’s head jerks up from the newspaper he’s been reading at the kitchen counter. A weepy, teary-eyed Robby stands in the doorway, trembling hand on his bump.

Jack’s entire heart plummets. For a whole minute, he can’t even move as his brain races. Oh god, what has he done wrong? Did he fuck up? Is Robby leaving him?? ‘Move. Get up!’ His brain shouts at him, but Jack is pretty sure he’ll throw up if he does that.

“Jack?” Robby sniffles, stepping into the kitchen.

Jack practically falls out of the kitchen stool as he scrambles over to Robby. His hands reach for his husband, one going automatically to the baby bump the other curing into the front of Robby’s white t-shirt. “Please, baby, tell me what happened. I’ll fix it. Whatever it is.” His voice comes out soothing and strained and just shy-of pleading. He forces control into it. He’ll prove to Robby he’s still capable. He’s still strong. He doesn’t know what’s happened. He’s been keeping Robby fed, fucked, and free of a single obligation.

Jack will prove he will be a great father to their children. That he’s the alpha male Robby needs. No one can do it like him. No one can care for Robby like he can…

Brows furrowing, brown eyes blooming with confusion, Robby blinks at him, droplets collecting like rain on his beautiful long lashes. “Fix what? These are happy tears, Jack. I - I can’t stop crying. These damn pregnancy hormones.”

And just like that the waterworks turn up. Tears pour from Robby’s eyes as he presses forward, slumping his head down onto Jack’s shoulder and nuzzling into his neck.

Relief rockets so hard and so fast through Jack it takes him a moment to wrap his arms around his husband. He fights his own tears as he rub’s Robby’s back in soothing circles, making soft sounds in his ear to comfort him. “Oh baby, that’s okay. You’re alright. Let it out.”

Hiccuping, Robby nuzzles in closer. “I just - I just read in one of the - hic - pregnancy books that it’s good for couples to go to - hic - therapy before the baby comes. Good to be on the same page. Good for the relationship because babies can change a lot of things. I just love you so - hic - much, Jack. You take such good care of me. I nev - hic - never thought I would have that. That I - that I deserved it. What do you think?”

Jack, who has been encouraging Robby to go to therapy for his own mental health for literal years, squeezes his husband tighter, the baby bump between them pressing almost painfully into his abs. He wants to shout his excitement from the rooftops. Wants to run laps around the neighborhood.

Instead, he just places a hand on the back of Robby’s head, patting gently. “Yeah, baby, I think that’s a great idea.”

33 Weeks:

It’s the middle of August and a heat wave has been simmering through Pittsburg for over a week now. Their AC has been working over time, but being as pregnant as he is, Robby’s hot all the time anyway.

“Do we have another fan, Jack? I thought we had another one in the study, but I can’t find it?”

Jack looks up from his laptop where he’s been studying notes from their last birthing class. It’s notes on how to be a good non-birthing parent during delivery that fill the screen. He’s determined to be the absolute best he can be for Robby when the time comes.

“Yeah, baby, let me chec - ”

The words die and dry up like water hitting a frying pan.

Because across the living room is Robby standing barefoot and wearing a crop top. Robby, his big, beautiful belly round and on full display. So big is his belly that Jack can barely see the short-shorts he’s got on underneath.

Waving a magazine like a fan towards his face, Robby says, “Jack?”

Jack is up and across the room in seconds. Without a word he lifts Robby clear off his feet. Squealing with surprise and joy, Robby scrambles to grab hold of his husband’s shoulders, arms flying around Jack’s neck. “Oh my god, put me down! I’m too heavy for you right now Jack, put me down!”

But Jack just nudges Robby’s legs to lock around his hips, twirling his husband around on the spot like he weighs nothing at all. “Jesus, look at you, baby. You’re gorgeous. You’re absolutely glowing.”

Blushing, Robby’s face goes red, and it’s not from the heat this time. “You think so?” he says, almost shyly. But internally, he is glowing. He’s never felt more beautiful than he has since he got pregnant. Jack’s always made him feel that way, but something has finally shifted in Robby. For the first time he really believes every word Jack says when he showers him with compliments.

“Baby, you’re stunning,” Jack says as he walks them towards the bedroom, his feet moving without his brain - which is still somewhere in the kitchen, too stunned to catch up.

Giggling, Robby presses kisses to Jack’s neck, who has set him down on the edge of the bed. Robby goes to peel off his crop top, his dick already swelling under Jack’s loving, heated gaze.

Jack reaches out quickly but gently, grasping his wrist to stop him. Shaking his head, his pupils blown wide, he says, “Leave it on.”

Grinning, his brain full of oxytocin and every feel-good chemical that’s ever existed, Robby does whatever Jack instructs him to do.

Jack’s eyes devour every bountiful inch of skin on Robby he can. It’s not just his body that has Jack hungry, though, it’s that smile on his husbands face, the way he’s seemed like such a happier, healthier person since he got pregnant.

In that moment, Jack vows to keep his husband filled up and knocked up as often as he’s possibly allowed.

Notes:

Thanks for reading :)

Would love a lil comment <3 it fuels me.

This had some omega!verse vibes, and while I have started enjoying reading those, I don't yet know enough about that universe to make this a fullblown omega!verse fic. I kind of hinted it could be, so if you read it that way, that's deff appropriate. But I didn't tag it as such because it's not really written specifically for that.

if you have any prompt ideas feel free to drop them in the comments below or just let me know how you like the story :)