#iwa.nii

[mulberrysilk]

First off congrats on 3k, and I hope you do well on your finals.

And now for what I came here for, I was rereading your Iwa-nii piece and now I can't stop thinking about what happens when he finally acts on his feelings.

Some tw: Masturbation. Forced pregnancy. And some cheating in a way.

So you come home to find a quiet house, you'd gotten home early from school, calling out a couple of times to see if anyone was home. When you get no response you make your way up the stairs, but stop in your tracks when you hear a loud groan of your name when you walk past the slightly open door of your dear step brother's room.

Curiosity gets the better of you and you open the door all the way to see your Iwa on his back, fisting himself, eyes closed, sweat on his forehead. You feel your mouth drool a little at the sight.

It doesn’t take him long to notice his presence in the room, but when he does his face heats up before he smirks and stands up, walks towards you, pulls you in, and then closes the door. He looks down at you, hand coming to rest underneath your chin before saying “Could you help your dear nii-chan?”

You feel a little dumbfounded, but still nod and let him lead you to the bed. He pulls your shirt and panties off, leaving your skirt on. He promises he won't do anything other than rub himself on you, pushing you on all fours. You miss him pulling out his phone and setting it underneath the two of you between your legs. Iwa keeps his promise for a couple of minutes, however the whines and moans you let out every time the head of his cock brushes against your clit and your opening has his resolve weakening.

He finally loses it after you subconsciously buck back against him, he pushes himself in in one movement, making you cry out. When he looks down and sees red coating his dick, he feels relief and pride in his chest. Iwa ignores your cries for him to pull out and thrust in and out of you. The fluttering of your walls has him cumming in you, he pulls back and looks at the way his cum oozes out of you. He picks up his phone and records it, and your fucked out state before sending it in the group chat he has with the other third years, turning off his phone so he doesn’t hear the constant dinging afterwards.

He continues to fuck you for the next couple of months making sure not to use a condom, ignoring the way you beg him to atleast use one. When you get a stomach bug, he makes you take a pregnancy test and he feels happy when it comes out positive and starts to come up with a plan so that your parents don’t suspect him, to let one of his friends take responsibility. It’s the perfect way to keep you and his child close.

Iwa let’s Mattsun fuck you since he thinks he’s the better option of his three friends. He has a stable job and is in Japan. Mattsun doesn’t know that Iwa has still been touching you after that video, thinking it was a one time thing, so he really does think the baby is his.

Even after you and Mattsun have been married for years, Iwa continues to have sex with you whenever he can, especially at the gym when you come and visit. Trying to get you pregnant before Mattsun. You end up having five kids, only one of them actually being Mattsun's

tw : stepcest, incest,coercion, noncon filiming , dubcon, noncon, cheating, masturbation

I— THIS. THIS. T H I S * sips tea* honey you know i live for drama like this in fics AFSGSHAJAJA 😭 poor mattsun tho 🥺 STILL— this made my mind goBRRR. THANK U ANON 😭💕 I’ll be done with finals by first week of June!!!

[mulberrysilk]

Listen Iwa nii, he knows that the way he feels about you is wrong, because even though your not blood related he basically watched you grow up. But he can't stop his feelings when his friends ask how you're doing, when they comment about how much you've grown your first year of college, and he can barely keep a straight face when they jokingly (maybe they being for reals tho) ask if he'll set one of them up with you, he'll basically see red if Oikawa is the one who asks.

HELL YES. Damnnnnnafsghsjd

I can imagine it REEE

warnings : stepcest, possessive Iwa-nii

Iwaizumi softly chuckled along with his best friends, the faint smell of beer and peach soju ( you hated beer), wafted through the living room, the television on a random channel and not paid attention to, just left on as background noise as they joked about the past and caught up with each other.

You were sat next to him on the couch, leaning comfortably against your sweet darling Iwa as you listened to your nii-chan’s friends.

“How have you been Y/N-Chan?” Oikawa suddenly asked, casually enough to not cause any awkward tension but Iwaizumi’s jaw clenched at his sudden interest.

“I’ve been okay...busy with college but I’m getting by,” you replied, leaning over to place your empty bottle of peach soju on the bottle crowded coffee table, Iwaizumi not missing the way your cute frilly blouse rode up a little, exposing the small of your back.

“You’re a big girl now,” Mattsun added, eyes raking in your form. You had grown up. No longer the little girl that would cower behind Iwaizumi’s figure when they came over, always having to be coaxed from shyness with candy or promises of something sweet.You were taller now compared to last they saw you but compared to them, you were still their little mouse. “What big girl things have you been doing? Not any boys I hope, Iwa might get a heart attack.”

Iwaizumi gritted his teeth. There better not be any boys.

“No, no, no,” you quickly answered, heat crawling up your cheeks. “I don’t like the guys in college...they’re too...ugh.” You cringed, thinking about their childish, frat boy behaviour.

“Don’t like guys in college? So you prefer to date guys a little older than you?” Makki questioned, a playful smirk on his face.

“I guess you can put it that way,” you murmured, crossing your leg, missing the way their eyes lingered on your exposed skin as you moved, even catching a little glimpse of your underwear. Was it pretty pale pink or white? “Why? You interested?” You joked.

“Maybe,” Makki winked at you, only making you laugh.

“I’m flattered.”

But your company was short lived, when your best friend asked you to go out to shop and you quickly kissed your nii-chan on the cheek before running out the door, Iwaizumi watching you get into her car his ears picking up the voices of his friends who were freely talking about you.

“Fuck, she’s gotten prettier hasn’t she?” Mattsun chuckled. “Cant believe you were hitting on her man.” He nudged Makki. “And in front of Iwa too.”

“Why not? You know what they say these days man, shoot your shot,” Makki shrugged, popping another beer open. Iwaizumi’s figure still stood by the window, still peering out to the empty street, lost in thought.

“Chibi-Chan looks so cute all dolled up,” Oikawa thought out loud. “Makki’s right. If Iwa’s going to let her date anyone, it’s gonna be either of us.”

Like hell will they get their greedy paws on you—

“He wants his little sister to be taken care of by people he trust. And who does he trust? Us.” Oikawa added, swiping his hair back.

Iwaizumi bit back a retort. He was right. As much as he hated to admit it, it would be better if one of them dated you. And yet the mere thought made his heart ache and his stomach churn with guilt. Guilt of the intimate feelings he harboured for his step-sister.

“Say, Iwa-chan! Why don’t you set me up with your cute little sister? Then I can be your brother in law and give you beautiful, cute nephews and nieces,” Oikawa half-joked, his confident laughter ringing throughout the room. “AH!” He clutched the back of his head where Iwa landed a strong smack. “Iwa-chan!!!”

Mattsun and Makki bursted out laughing, the pouty pained face of their former captain one that always hit their funny bone, completely missing the way Iwaizumi’s usual scowl disappeared, replaced by a stone cold demeanour that looked down at Oikawa as if to tell him to know his place and that no one will ever be good enough for you.

“Don’t you dare lay a hand on her, Oikawa,” his voice was low and only loud enough for the setters ears to hear amongst the loud laughter from his other two friends who also had intentions to steal you from him.

Oikawa gulped, feeling the far darker aura brooding over him. Plus, Iwa called Oikawa not Shittykawa, Trashykawa and so on and so forth.

The brunette let out a nervous chuckle.

“Jeez, Iwa-chan, you almost slapped my head right off my shoulders.” He rubbed the nape of his neck, stretching it a little as Iwaizumi returned to his spot on the sofa.

Was he always this protective over you? Oikawa wondered.

“Better look out for her, Iwa.” Mattsun spoke up, reclining further into the soft armchair. “Boys her age these days are no good and they’re fucking creeps.”

“I know,” Iwaizumi sighed. He knew more than anyone. That’s why he always drove you to and from campus, he dreaded the idea of you having to stay in a dorm. All the troubles and misfortunes that could befall you if you did would have him worry over you from dusk til dawn.

Plus, who would you go to when you had a nightmare or felt scared at night? Big as you were now, you were still his little sister who would whimper a cute ‘nii-chan’ in the middle of the night and stand at his door til he beckons you over to embrace you. Iwaizumi couldn’t imagine anyone else treating you and taking care of you better than he did.

If you were to have stayed in the dorm, he wouldn’t be able to feel the exposed skin of your thighs when you’re clutching onto him on his bed, eyes closed and deep in peaceful slumber. Wouldn’t feel the softness of your breasts and the warmth of your body pressed against his chest when you lay on top of him when the two of you just lounged about in the house, reading or playing games. He would miss so much more about you if you were away. Even when he was sent to California and you were still on your last two years of highschool, he asked Makki or Mattsun to look after you.

His phone buzzed in his pocket and he immediately opened it to see your message.

‘We just got to the mall, Haji-nii <3 I won’t stay out too late, I’ll be home at around 6.’

Warmth fluttered in his chest as a small smile etched on his face. He didn’t have to worry too much since you were such a good girl. A goody two shoes that loved her nii-san more than anything in the world.

‘Okay. Dinner will be ready when you get home. Stay safe.’

And immediately you responded.

‘I will! Love you nii-chan <3.’

‘Love you too.’ He replied before shoving his phone in his pocket again, grabbing his beer and staring at whatever flickered in the tv, not really paying attention to it but spacing out as he thought over and over about how he felt about you.

He did love you. More than you could possibly fathom.