cw: modern au, accidental armpit kink acquisition, incest, nsfw-ish, pregnancy & abortion ment, manipulation, vashussy
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nai and vash pushing their single beds together to make one bigger bed they can cuddle on. their adopted mother doesn’t really say anything
about it, she’s just happy the pair are getting along. especially since some of the other moms in her ‘mom support group’ have been having issues with their teens suddenly hating each other.
but rem is just happy to never have that problem, so she says nothing when she notices
the bed.
she tries to give them more privacy, since they’re both going through body changes and she remembers how hard it was to be that age and have parents constantly hovering over her shoulder.
besides, they were such good boys. never gave her an ounce of /real/ problems.
and eventually, vash snuggles into nai in his sleep. nai puts an arm around vash, pulling him even closer. the scent of vash’s shampoo tickles his nose, and vash buries himself deeper into nai’s side.
this becomes their usual for a while, until vash starts moving in different ways in his sleep.
his one leg is slung over nai’s hip, and he’s practically dry humping his brother, whimpering into nai’s underarm.
nai doesn’t wake him, and certainly doesn’t stop him. he allows it to happen, although he’s wide awake.
he allows it to continue happening, it becomes more frequent and more frequent. until he feels a wet, slimy little stripe up his underarm.
and vash groggily whisper out, “nai?”
and he swallows down his nerves, because he cannot act like this isn’t okay. he can’t upset his brother, he’d only run from him. probably ask to move to the basement or something, even though vash relished in the sunlight.
besides, it’s not like it /wasn’t/ okay. nai’s been waiting for an opportunity to keep his brother all to himself. so now he’d just have to make up some bullshit about how they were just primally recognizing each other as mates because of their pheromones or something.
completely natural, completely normal… right?
and so what if the rest of the conversation is spent trying to manipulate vash into letting nai finally fuck him?
so what if nai’s gotten really good at lying the past few years (re: teenager) and convinces vash that twins are allowed to have sex with each other because they can’t get pregnant from it?
and so fucking what if three months later vash finally starts showing and refuses to get rid of it, much to rem’s disdain, because nai drilled into his head that god blessed them with a child when it was impossible, and that it would be a sin to refuse god’s gift?
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LISTEN. i don’t write plantcest so i’m sorry. i cannot do them poetic justice. i am just a horny gremlin (இ﹏இ`。)
just something about nai planning his first time with vash so carefully and meticulously in his head. he makes a point to himself that he wants to 𝘮𝘢𝘬𝘦 𝘭𝘰𝘷𝘦 to vash. to be gentle, patient, and tender with his other half.
🧵⬇️
and then when the opportunity arises, those thoughts are lost to his carnal desires.
he’s rough, pressing vash into an unforgiving mating press and giving him everything he’s got. he’s so desperate to feel his brother, but also desperate to breed him.
vash would be sobbing under him, begging him to stop, to 𝘱𝘶𝘭𝘭 𝘰𝘶𝘵. that 𝘴𝘰𝘮𝘦𝘵𝘩𝘪𝘯𝘨 𝘧𝘦𝘦𝘭𝘴 𝘸𝘳𝘰𝘯𝘨. but nai would refuse, know that this is what’s best for vash.
but his boyfriend? 𝘥𝘦𝘬𝘶?
he was 𝘯𝘰𝘵 a trivial thing.
okay, so maybe deku wasn’t 𝘦𝘹𝘢𝘤𝘵𝘭𝘺 his boyfriend. but he practically was!
they went on regular dates… and they were almost always together. deku always asked katsuki if he was going to get-together and parties, as if insinuating he wouldn’t go without the blond.
so why did his stomach curl up every time izuku sat too close to shouto? while he stood next to his friend, hanta, watching their boyfriends get a little too close.
he takes his time working izuku’s ass open on his fingers. his cock is twitching in anticipation as he slips four fingers in to the knuckle, and izuku /keens/.
izuku’s back arches off the bed, little tears in his eyes. he’s sobbing so beautifully, begging for katsuki’s cock.
katsuki pulls his fingers out of izuku’s gaping hole, shucking his underwear off on a hurry.
the friction of the fabric against his swollen cock makes him drip with anticipation.
izuku spreads his legs for katsuki, and katsuki eagerly mounts him.
his cock feels like it’s going to melt off once he slides into izuku’s hole.
cw: nsfw, exhibitionism/voyeurism, jealousy, secret established relationship
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katsuki being a shower, and izuku being a grower, and the locker room talk is /absolutely/ raunchy. everyone saying how katsuki /must/ fuck.
and izuku just casually mentions that katsuki can only cum from his prostate, and mindlessly adds “you should see it” not really /offering/
and everyone is so eager to watch and they agree and izuku looks to kacchan for guidance and he’s a little flushed and embarrassed but maybe sorta into it? which makes sense because he loves when izuku shows him /who he belongs to/
just can’t stop thinking about izuku humping his pillow until he cums all over it, whimpering and moaning “kacchan, kacchan, kacchan” all while katsuki is right outside of his door.
his fist is still raised, frozen in place moments before he was gonna beat at the door. his cheeks are pinky, and his dick is straining against his pants.
he turns around, and goes back to his dorm and furiously jerks off without saying a word to izuku.
he comes back the next night, but there’s nothing. he comes again the next night, still nothing.
until exactly one week later, it happens again. he laughs to himself, of course the nerd would have a /schedule/ to get off.