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my sister's peculiar problem

Summary:

Illuga has an older sister.

Four years apart, he’s born in Winter, she’s born in Spring. He's a college freshman, she stays at home. They're almost the same height, Illuga only a single inch taller. He looks up to her and she supports him, enough to allow him to move in her apartment near his classes.

He would say they have a perfectly healthy, normal relationship.

For the most part.

Notes:

now i know what ur thinking. why base a fic on that one r/teenagers post? really, i dunno either. illuga wasnt intended as the mc of this but when i brought this up to my oomf dia we just bounced off ideas until she gave me the idea of lohen's involvement.

god i want lohen bad. but this will take time.

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

Chapter Text

Illuga has an older sister.

 

Four years apart, he’s born in Winter, she’s born in Spring. He's a college freshman, she stays at home. They're almost the same height, Illuga only a single inch taller. He looks up to her and she supports him, enough to allow him to move in her apartment near his classes.

 

He would say they have a perfectly healthy, normal relationship. 

 

For the most part.

 

“Sis, I'm ho- what the fuck?!” 

 

Almost on cue, the second he opens the door, his older sister sits on the living room couch, her pajama pants removed. She shoves two of her fingers inside her sopping wet pussy, the squelching sounds only defeated by the game she’s playing on the computer. His computer. Her other hand holds the controller, the left handle rubbing on her throbbing clit.

 

“Ah, ahh- oh, welcome home Illuga…” she finally wakes up from her (quite anti-climatic) high, the hand inside of her slipping away to wave to him. “How was your day? I got food for… mm, Aedon! By the way, did you see a box with my name on it?” she says, giving him a bright smile. No no, she cannot make that smile when she casually exposed herself in front of him! 

 

But then again, this is a normal day when it comes to Illuga. This had been the norm way back when they were teenagers. Given how they shared a room since childhood, he's paid witness to his sister’s constant masturbation when she was of appropriate age. ‘Appropriate’, being used lightly here…

 

From morning to night, she would go at it — fingers, pillows, even objects that girls shouldn’t rub against their pussy. It even went as far as their mother telling her to keep her voice down or use a towel, but it all fell on deaf ears. As much as he has no business knowing what kind of fetishes she might have, he’s certain that exhibitionism is one of them.

 

He ignores her pulling up her panties, only left in her shirt as she runs up behind him for a tight hug. And given that she did… all of that… “Y-You don’t have to hug me after…” Illuga doesn’t like saying such phrases like ‘jerking off’ or ‘flicking the bean’, so dirty. He clears his throat, putting down his suitcase. “Anyways, I won’t be here much longer. Mika and Lohen are waiting outside.”

 

“Oh, are they coming inside? Hehe, come inside…” his sister says, her slim hands coursing through his shoulders. Lewd, inside and out. He wouldn’t admit it, but Illuga does enjoy it when his sister comes into contact with him. Her voice is soft, her skin is soft, and when she’s masturbating she’s incredibly cute… But at the end of the day… she’s his sister. And he has standards! “Oh yeah, Mika is Huffy’s little bro, right? And Lohen… who is he again? Is he cute?” 

 

Huffman used to be her boyfriend, and in turn he got to know his own younger brother Mika. Yet the relationship didn’t last long; Illuga’s theory being that Huffman couldn’t keep up with her crazy libido. He is glad that with Mika understanding, they still stay as friends. What he knew about her was that… she’s a “nice lady”. Oh Mika, you sweet summer child.

 

Lohen on the other hand… he’s the second weirdest person Illuga’s ever met, behind her. First time he saw him, he came to the college infirmary in front of him with a bleeding face and pre-bandaged fists. Blood wasn’t his, he said. This and that happened, ending up with Lohen being a part of his inner circle. But he’s also… very intrusive, to say the least. Couldn’t stop calling him ‘birdie’ and loves teasing him. But what really was troubling (outside of his penchant for fighting) was how the last time he was interested in someone, he wondered if he could install a camera to watch them at home. Limerence can do that to you. If he found out about his big sister, who knows how deranged he’d become over her!

 

Because of this, he kept up a boundary with him that extended with Mika as well — nobody is allowed inside his house. Only the front door and a few steps in the living room. It’s not like he’s disappointed in his sister; it’s just that there’s a VERY giant chance that they’ll intrude on her… ‘daily goon sesh’? Ugh, he hated thinking that. All in all, true protective brother behavior.

 

To Mika, his sister is just a busy woman. To Lohen, he doesn’t have a sister. And it’s staying that way, until… oh, that he didn't think through. He promises to tell them one of these days, just not now.

 

“Illuga~ are you listening to me?” his sister speaks up again, fingers now swarming on his chest. “Wanna touch me before you go? It'll be quick…” she whispers, hot breath on his earlobe before kissing it. He should push her away, tell her to be a responsible older sister for once. But her hand on his coupled with his half hard cock beg to differ. 

 

He shakes his head from any perverted thoughts, politely brushing off her hands from his shoulders. “Sorry, they’re waiting for me, so—” and like clockwork, you retreat back to the couch, fingers coated in slick as she jerks off once again. “Hey! This isn’t over, you know!” stomping in front of the television, Illuga places his hands on his hips, ready to berate her again.

 

Which only makes her more turned on than before! 

 

“Sorry… seeing you mad makes me so horny… insult me again real quick?”

 

Being insulted is a fetish?! Face brighter than the red highlights on his hair, Illuga turns around from you, giving you space as your panties spring from your legs and to the air. “You should know by now… we can’t do those lewd things together! We’re brother and sister for god's sake!” he knows that what he’s saying no longer matters. And by the time he turns, her fluids are splashing right on his shirt. And the face she makes when she finishes…

 

“Wha– wha…”

 

“Wahhh! Sorry Illuga, I’ll wipe it all off!” she stands up again, the afterglow immediately vanished as she tries to wipe her slick off him, only for her hand to slip right below his belt–

 

Enough! I’m… ugh!” Picking up his bag, Illuga storms out the door, another fork in the road as Lohen stands there, hand lifted up in a knocking motion. And since Illuga has this mess on his shirt, paired with his barelegged sister on her knees, her breasts peaking from her pajama top… “Don’t say a word! We’re leaving!” Yanking the other boy’s arm, he ignores whatever reply either you or Lohen could say as he and him march out of there.

 

Not the best first meeting.

 


 

“Soooo… your sister’s pretty cute.”

 

“Where’s your pocket knife? I need to cut your tongue off.”

 

“Aww, birdie! I’m so glad you’re getting into sadism, want me to teach you?” In the midst of a supposed study session, the silence broke the second Lohen spoke of Illuga’s sister. So much for secrecy. He leans his head forward, twirling a pen on his nimble fingers. “Though I should be mad — how dare you hide such a beautiful girl from me— err, us for so long? And for it to be your big sis, nonetheless. Shame on you.” he grumbles at those last words, head on the table as his deep blue eyes give a sharp glare.

 

Mika, having paid far too much attention to this topic, lifts his hand in between the two. “I’ve met her a few times, and she wasn’t all… y’know.” he sheepishly smiles, contrasting with the harsh sigh Illuga lets out. “At least… she’s doing well for herself.”

 

Doing well… Illuga could only scoff. “Sorry to burst your bubble, but she’s anything but well. She… hey, can I be descript?”

 

“Seeing as you have big sis’ girlcum on your shirt, I’d say go for it. Haha, girlcum Illuga~” Oh how Lohen loves fanning the flames. Once he and Mika lean closer, their heads turning in case anyone else were in the library at this late hour, Illuga starts his story.

 

His palm to his lips, Illuga clears his throat. “She’s always been like this since she was 17 or so. Would masturbate any time, any place. And since we shared a room for so long, she loves to tell me if she came, like I’m her diary! Not to mention, she’s always trying to make a move on me! And I’m sorry Mika, this went on even when her and Mr. Huffman were dating!” he didn’t even need to look at the shock in the blond’s face. 

 

Lohen raises his head, confused at what he’s processing. “I don’t get it. If a girl as pretty as her is throwing herself at you, why aren’t you jumping in? If I had a girlfriend like that, I’d never let her go.” he grins at his own thoughts, turning away as he blushes.

 

The way he didn’t care about Illuga’s obvious issues set him off further. “She’s my… ugh! I had enough! Mika, you wouldn't mind me staying at your place?”

 

As if his eyes couldn’t get any wider than they are, Mika almost coughs from nothing. “My place? I mean…” he sighs, his hand rubbing on his friend’s shoulder. “Are you gonna apologize to her later?” Oh, right. In truth, Illuga doesn’t like the idea of making his dear older sister feel bad about herself or their relationship. Communication was important, after all.

 

“... I'll try my best. But, I want to give her space.”

 

“You're just gonna leave her behind and wallow in her sadness? What if you get into an accident and she doesn't know where you are?” Lohen questions him, an eyebrow raised as he shuts his notebook. He sighs, taking all his materials in his bag. “I'm heading out, coach called. Better think of the consequences, birdie~” 

 

Clicking his tongue, Illuga wraps up as well, knowing that he won’t stay mad at her forever.

 


 

“You sure about the couch? I always have space on my bed.” Mika wonders, passing Illuga two pillows and a spare blanket.

 

Illuga nods his head, holding all those items in his arms. “No worries. I mean, I'm close to the kitchen and the bathroom.” once he gave the blonde a good night, he lets out a deep sigh, the only sound in the room being the ticking clock. 

 

Back at home, he would usually hear his sister listen to music to hum after, or to draw on her tablet. She’d ask him if he wanted a midnight snack, offering food that was for herself, only to give him half.

 

Most prevalently, she’d hug him tightly, not wanting him to let go.

 

Wait, was he… already missing her? Ah, he was already taking back his words, taking back his anger that wasn’t deserved. Lohen was right; his older sister wallowing in her sadness was a frightening thought. Scrounging in his suitcase bag, he gets out his phone and unlocks it, the homescreen being a picture he took of her eating ice cream. He remembered how flustered she’d get when she heard the flash, wanting a proper reason to punish him at her most vulnerable.

 

Even when she's mad, she's still beautiful.

 

“God…” enough was enough. Illuga will wave his white flag and call her number, slowly dialing the digits as he takes a few deep breaths. Now or never.

 

The phone rings, once, twice… thrice. “Hello~ this is [name]. Sorry for the delay, I’ll get back to it soon!” She didn’t pick up. No, no, no, don’t think about the worst possible theory. Cutting off the voicemail beep, Illuga tries again. One ring, two ring— “Ah! Illuga, is that you?” heart finally slowing down, Illuga was so happy to hear your voice again after… it doesn’t matter now.

 

“Uhh… hey sis. I just want to say that I’m sorry fo—”

 

“Mmgh, don’t be so… ah, hard on yourself!” she interrupts him, her voice shaky and breathy. He knows she wouldn’t do her usual business on the phone with him. But god, was hearing her moan like that, so close to his ear and all, made him a little excited. “Ehh, ahh… are you still mad at me?” she asks him, her voice muffled as she grunts just a little harder.

 

It would be guilty of him if his erection wasn’t growing by the second. And yet, he refuses to stop right here. Palm lowering down his briefs, he hopes to god that both this phone call and the actions he’s about to make won’t wake Mika up. “No… no, I’m not, sis. I’m glad you’re… ah, talking to me.” Illuga replies, slowly petting his clothed cock as he continues to talk. 

 

“Good… I can’t, ah ah ah, wait to see you tomorrow, mmgh…!” What was it about her voice that always made him so... hard? And she sounds like she was hard at work, probably using her fingers or a toy. Keep going, was the only thing he can think of, believing her release was already this close. He wishes he would be right there, making sweet, apologetic love to her as he pounds his cock in his older sister’s lewd cunt, enveloping him in her warmth as they connect. And she would be so kind to him the whole time, allowing him to come inside of her.

 

Oh right, his sister. 

 

Who cares anymore? Illuga sure doesn’t. “I’ll be… coming, coming, ahh—” he grunts for the last time, head tilted back, knees bunched together as he finishes on his boxers, a wide stain on his underwear as his cum leaks there. He didn’t notice that the call has ended, only lasting for about 3 minutes.

 

3 minutes being all he needed to beg to be inside of her.