˚ ༘ 🍼𖦹⋆｡˚ a pledge to keep series masterlist ˚ ༘ 🍼𖦹⋆｡˚
summary: getting knocked up by your older brother’s fratbro wasn't exactly apart of your five year plan. least of all with notorious fuck boy ryomen sukuna.
pairing: frat!kuna x reader
content: everything in this series is considered 18+ so not minor friendly! contains mature content such as rough sex, breeding, spanking, spit play, lactation kink, descriptive child birth, postpartum depression, probably more
dividers by: @petalpxl | series moodboard | art by @xxlorinmower
chapter one: how you met \ chapter two: of course it's yours, you fucking idiot!
chapter three: meeting the itadori's \ chapter four: hospitals and hot dad walks
chapter five: fratuncles \ chapter six: more than co-parents
series oneshots/drabbles:
1. stinky feet bandit ❀ 2. late night feeds ❀ 3. daddy's little poop monster ❀ 4. baby carrier experiment ❀ 5. yuji loves his baby cousin
Warnings: Fluff, Humor, Domestic Fluff, Married Couple, Jealous Sukuna, Soft Sukuna, Teasing, Play Fighting, Embarrassed Sukuna, Yuji is Spoiled Rotten, Family Dynamics, Kissing, Suggestive Themes, Light Sexual Tension, “Good Boy” Allegations, Possessive Sukuna, Sukuna Gets Bullied, Baby Talk, Crack Treated Seriously, Fluff and Comedy, Mildly Suggestive Ending
Synopsis: Sukuna gets jealous of a toddler, gets babied against his will, and accidentally humiliates himself in front of his brother. Yuji enjoys every second of it.
“Who’s my good baby?” you coo, smiling as you hold little Yuji on your lap like he’s still tiny enough to fit in one arm.
“Me!” Yuji shouts immediately, throwing both of his hands into the air with the biggest grin on his face, proud and excited like he’d been waiting for that exact question all day.
You laugh softly. “Yes, you are.”
You attack his cheeks and neck with kisses, holding him so tightly it borders on excessive. Yuji squirms in your arms, giggling uncontrollably as he tries to hide from the kisses behind his tiny hands, his face turning red from laughing so hard.
“Stohooop—!” he squeals between breaths.
“No. Never,” you say dramatically before kissing his forehead again.
From the other side of the couch, Sukuna watches the entire thing with his usual irritated expression, one arm stretched across the backrest while his fingers tap impatiently against the sofa cushion.
For the last thirty minutes, it’s been nothing but you and Yuji laughing, cuddling, talking nonsense, and completely ignoring him.
You were at Jin’s house for dinner while Jin prepared the grill outside in the yard.
Unfortunately for Sukuna, the moment you stepped into the house, all your attention immediately went to Yuji.
“He’s not a baby anymore,” Sukuna mutters dryly, finally interrupting the laughter. “Stop saying that. You’re gonna turn him into even more of a crybaby.”
The room instantly goes quiet.
You slowly turn your head toward your husband with exaggerated shock written all over your face.
Yuji does the same from your lap, eyes wide like Sukuna had just personally insulted his entire bloodline.
“Oh my god,” you gasp softly, pulling Yuji protectively against your chest. “Did you hear what your uncle just said to you?”
Yuji immediately catches on, wrapping his little arms around you and hiding against you dramatically with the saddest pout he can manage.
The two of you are unbelievably dramatic.
“Don’t listen to him,” you whisper to Yuji while glaring at Sukuna. “He’s just jealous and grumpy.”
Yuji peeks over your shoulder toward Sukuna.
“You’ll always be a baby, right?” you ask gently, cupping his cheeks before kissing his forehead.
Yuji nods without hesitation, still pouting for effect before resting his head back against you like he’d just suffered emotional damage.
And honestly? Even if Yuji wasn’t technically a baby anymore—already three years old somehow—you still couldn’t help it.
He was too cute.
Sukuna lets out a sarcastic laugh from across the couch.
“Jealous?” he repeats. “Why the hell would I be jealous of a kid who still can’t even use the bathroom properly?”
You narrow your eyes at your husband, even though you’re clearly fighting back a smile.
“Of course he can’t, you idiot,” you say slowly, emphasizing every word like Sukuna was the dumb one here. “He’s just a baby.”
Yuji immediately bursts into laughter at the word idiot, nearly falling sideways against you.
Sukuna clicks his tongue in annoyance, but you don’t miss the way his eyes linger on the two of you for a second too long.
Because as much as he complains, as much as he rolls his eyes and acts bothered—
he’s been staring at you the entire time.
“Okay, that’s enough, brat. We have to take you back to your dad,” Sukuna says as he finally gets up from the couch, clearly done with being ignored.
The moment he reaches for Yuji, the little boy clings to you even tighter than before.
“No, no, no!” Yuji whines, wrapping his tiny arms around your neck with surprising strength for a three-year-old.
Honestly, you almost laugh.
Sukuna has been sulking for the past half hour just because your attention hasn’t been on him for more than five seconds.
Yuji buries his face against your shoulder dramatically, holding onto you like Sukuna’s trying to drag him into battle instead of across the living room.
You gently rub his back before standing up with him still on your hip.
“I know what your uncle needs, Yuji,” you say thoughtfully, looking down at him.
Sukuna immediately narrows his eyes.
“…What does that mean?”
You don’t answer.
Instead, you walk over to the couch and carefully place Yuji where Sukuna had been sitting seconds ago. Yuji obediently stays there, small hands resting on his lap as he watches you with that soft, curious expression he always has.
Then you sit back down in your original spot and pat the space beside you.
“Come here.”
Sukuna looks at you suspiciously.
“What are you planning—”
“Sit down.”
He clicks his tongue in annoyance, but after a few seconds of staring, he gives in and drops down beside you with a grumble.
The second he does, your arms wrap around him.
Sukuna stiffens immediately as you pull him against your chest, holding him close the exact same way you’d been holding Yuji all afternoon.
“What the hell—”
You cup his face before he can pull away, forcing him to look at you.
“Ohhh,” you coo softly, using the same sweet voice from earlier. “You needed attention too, huh?”
Across from you, Yuji gasps quietly like he’s witnessing something incredible.
“You wanna be spoiled too?” you continue teasingly, pressing kisses all over Sukuna’s face before he can escape. “You need love too, baby?”
“Stop.”
Sukuna tries shoving you away, but it’s weak. Half-hearted.
Because if he actually wanted to get away from you, he would’ve already done it.
Instead, he stays there trapped in your arms while you continue smothering him with affection.
You hug him tighter around the neck, rocking him slightly against your chest just to make it worse.
“Who’s a good boy?” you ask dramatically.
Yuji immediately points at Sukuna from the couch.
“Him!”
You nearly burst out laughing.
“Yes, him,” you say proudly before squishing Sukuna’s cheeks between your hands again. “It’s you, Ryo, isn’t it? You’re the good boy.”
Sukuna’s face twists into a deep frown, though there’s the faintest hint of red creeping across his ears now.
“Let go of me,” he mutters.
“Nooo,” you mimic Yuji’s earlier tone.
Yuji starts laughing so hard he almost falls sideways into the couch cushions.
And somehow, that only makes Sukuna look even more offended.
“You have to say it back too,” you insist, holding Sukuna’s chin between your fingers before glancing over at Yuji. “Just like Yuji does, right?”
Yuji nods enthusiastically from his spot on the couch, completely invested in his uncle’s humiliation.
“Yes!” he chirps happily.
You keep using that unbearably sweet baby voice on purpose, making every word more exaggerated than the last just to irritate Sukuna further.
And judging by the deepening crease between his brows, it’s working perfectly.
“Come on,” you tease. “Say it.”
Sukuna stares at you in silence.
You point dramatically at your lips, pouting slightly. “Tell me you’re a good boy and give me a kiss.”
Yuji gasps like this is the most important moment of his life.
Sukuna finally snaps.
Before you can laugh again, he suddenly grabs both your wrists and pushes you back onto the couch. A surprised yelp leaves your lips as you land awkwardly against the cushions, one leg still hanging off the side of the couch while the other bends underneath you.
Your wrists are pinned beside your head.
Sukuna hovers above you, one knee pressed into the couch between your legs while the other foot stays planted on the floor for balance.
“There,” he mutters darkly. “Happy now?”
Despite the glare he’s giving you, there’s still that faint blush spreading across the tips of his ears.
He leans down to kiss you—
but you immediately turn your head away with a smug grin.
“Nope.”
Sukuna pauses.
“No kiss unless you say it,” you sing teasingly. “That’s what bad boys get.”
Even saying it makes you cringe a little, but the look on Sukuna’s face is absolutely worth it.
“You’re insane if you think I’m saying that shit,” he grumbles, trying again to kiss you.
You dodge him once more, shaking your head dramatically.
“Nope.”
He tries again.
You dodge him with a smug grin.
Sukuna lets out an irritated click of his tongue, growing visibly more annoyed every second you deny him.
Meanwhile, Yuji is sitting there kicking his little feet against the couch cushions, watching the whole thing like live entertainment.
Finally, Sukuna gives up with a long, suffering sigh.
“Fine,” he mutters through gritted teeth. “I’m a… good… boy.”
He says it so quietly it’s almost embarrassing.
Almost.
The second the words leave his mouth, you burst into laughter.
Yuji immediately joins in, laughing just as hard despite probably not fully understanding why anymore.
Sukuna looks genuinely offended.
“Shut up,” he mutters before finally managing to catch your lips in a quick kiss.
Then another.
And another.
Little impatient kisses meant to shut you up more than anything else.
Unfortunately for him, they only make you laugh harder.
“I hope Yuji remembers this forever,” you wheeze, clutching your stomach dramatically from laughing too much.
“I’m gonna kill you.”
“You already called yourself a good boy in front of a toddler. It’s over for you.”
Before Sukuna can retaliate, another voice suddenly cuts through the room.
“What the hell are you two doing?”
Everything freezes.
You and Sukuna both turn at the same time toward the doorway.
Jin stands there holding a plate in one hand, staring at the scene in complete disbelief.
Sukuna practically jumps away from you.
“You have Yuji right there,” Jin says slowly, clearly trying to process whatever horrifying thing he just walked into. “Can you save your weird things for literally any other time?”
Yuji waves happily at his dad from the couch.
“Unc Kuna good boy!” he announces proudly.
Silence.
Absolute silence.
You immediately bury your face into the couch cushion to stop yourself from screaming with laughter.
Meanwhile, Sukuna looks genuinely ready to die from humiliation.
The red spreading across his ears quickly travels down his neck.
“Come on, Yuji,” Jin sighs, walking over to pick him up. “Dinner’s ready.”
Yuji raises his arms happily to be carried.
As Jin heads back toward the yard, he gives Sukuna one last judgmental look.
“And I don’t wanna see whatever the hell this is again.”
The second they disappear outside, you lose it completely.
Your laughter fills the room again while Sukuna stands there rubbing a hand down his face in humiliation.
“I can’t believe I said that shit out loud.” he mutters.
You’re still laughing when he suddenly turns toward you.
That embarrassed expression slowly twists into something more dangerous. More mischievous.
Your laughter falters slightly.
Sukuna leans down close enough for his breath to brush against your ear.
“You think this is funny now?” he murmurs.
The low tone of his voice sends a shiver straight down your spine.
“When we get home,” he whispers, “we’ll see now who the good girl is.”
Then, like he hadn’t just threatened your entire existence, he presses a soft, innocent kiss against your cheek.
And walks away.
You stay frozen on the couch in complete shock.
…Maybe you pushed him a little too far.
──────────────────────
Reblogs and likes are super appreciated 💗 thank you for reading!
a/n: I wanna try writing other characters too but honestly I have no idea if I can actually capture their personalities properly 😭 Sukuna is just… Sukuna. He’s way too easy for me to write because his whole vibe is already loud, chaotic, and unhinged in my brain.
Also I would LOVE to write about true form Sukuna I swear when I think about him I lose all sense of productivity and suddenly I’m just like 😶🌫️ anyway.
BUT I am still learning how to write smut (pls be nice to me 😭) and I feel like adding multiple limbs into the equation does NOT make it easier help—
so yeah I’m trying my best. please be patient with me while I slowly descend into the fanfic writings.
