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trivia-yandere · 4 months

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fixation

a look into where it all began with jungkook and how much he loves having his lips on you… @darkuni63 @sweetempathprunetree @momnomnom

warning: step-sibling relationship, coercion, oral sex, slight yandere behavior, manipulation, nipple sucking, dry humping/grinding, fingering,

word count: 4.639

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You’ve known Jeon Jungkook since you were a child - 10 years of age. Your father had brought his mother - a beautiful woman, you’d admit, and her son over for dinner one night while you stayed the weekend with him. “Y/N, this is Jungkook.” you recall your father speaking, his hands upon Jungkook’s shoulders. You were seated at the dining table when the two of them arrived. “He’s going to be your brother.”

Jungkook acted the part - even if the two of you were the same age - as the annoying brother. You could also blame your 10 year old self, as well, for how you acted. You were an only child - a girl, at that - and finally, your father had a son. He and Jungkook watched sports together and went to games often. They would go fishing and when you came on the weekend, you’d hear Jungkook brag about it constantly.

But even if your father now had a son, Jungkook’s mother had a daughter. She enjoyed doing your hair the best she could and attempting to go places with you that she could only dream a mother and daughter duo would go - but that never angered Jungkook as much as it angered you that he was with your father.

“It's just a little sibling rivalry.” your father said to Jungkook’s mother - now his wife - when you and Jungkook were attending middle school. Jungkook was new to your school and yet, he excelled. He had more friends than you and charted the highest scores - the two of you being tied academically.

Every worry Jungkook’s mother had was brushed off by your father. “They act just like siblings.” he’d say with a laugh whenever you and Jungkook bickered over everything - and nothing. You dreaded going to your fathers on the weekends because that meant that you’d have to see and deal with Jungkook entirely - and he was nothing but a pain in the ass.

High School was the same, the only difference was the change in appearances. Jungkook grew overnight it seems and his high voice deepened. He worked out more due to him playing sports and that also meant his body changed, as well.

“That’s your brother?!” a friend said with wide eyes when Jungkook had given you a sideways hug (a rule he had broken just to piss you off) and said: “Dad wants us to ride home together.”

And from that moment, you were Jungkook’s sister - not Y/N, but Jeon fucking Jungkook’s sister and you suspected he did it purposely.

And Jungkook had - something he’d never admit to you. Just as his body developed in High School, so has yours and by senior year you were the talk of the boys locker room (as were most senior girls). “Y/N’s ass is amazing.” one boy had said as he walked in, his eyes focused down the hall where Jungkook assumed you were standing. “She has the perfect hips.”

“Her lips are good, too.” said another boy. “I just know she knows how to suck-”

“That’s my sister.” Jungkook deadpanned, his eyes narrow at the boys who immediately silence their crude talk about you.

A side of Jungkook told himself that he respected you as his (step) sister and didn’t like the filthy thoughts coming from others. But then there was the side of him that he wanted to bury away that agreed with them.

Jungkook had noticed that same day how your hips were nice and your ass was amazing. As you and he walked out of school together that Friday, he noticed as you sat in his car (a gift from your father since Jungkook had gotten his license before you) that your lips were good. You were coating them with gloss, eyes focused on the mirror to not mess anything up.

Once these thoughts were there, they weren’t going away; as disgusting as it was.

You were his (step) sister and Jungkook had respect for you - even if the two of you fought constantly. You appeared to dislike him as a whole as you grew older and of course, he’d tease you and say it was because he was better than you at everything - but still, you were his sister.

The thoughts he held for you were impure and they weren’t going to go away until he fixed them.

It started subtle at first; light touches. He’d brush by you on the weekends when you’d come. Now teenagers at 18 of age, you two were often left alone. Your father would often go out with Jungkook’s mother and neither of you minded - Jungkook would bring his friends over and sometimes, you’d do the same. This weekend was different, however. There was a change in Jungkook’s behavior.

Jungkook would hold your hips often when passing by. He’d place a hand on your lower back when he comes up from behind you. His teasing never ceased, but they became more…sensual?

Your mind tells you that it’s in your head. Jungkook was (unfortunately) your brother - step brother - but a brother nonetheless. He has now introduced you as his sister at school and that now means you had girls you’d never talk to attempting to speak with you in order to get to the person that was Jeon Jungkook.

The first time you’ve done something with Jeon Jungkook you had cried and vomited when you came back to your senses. “Stop being scared.” Jungkook said, passing you the glass with a shot's worth of alcohol in it. “Dad would never know.”

You grabbed the glass only because you didn’t want to appear like a loser. It was the weekend once more and you stayed at your father’s home and it was the same weekend your father and step-mother were celebrating their anniversary away. They felt comfortable leaving you and Jungkook alone more now since graduation was right around the corner.

A few friends and no parties was your father’s rule and that’s exactly what you’ve stuck by. Jungkook had a few friends each over while you decided to remain alone - Taehyung was someone you were nervous around because he was older and college age. He was far more experienced in drinking than you’d ever be and you didn’t want to appear like a fool.

“Your sister’s so cute.” Jimin had said to you - the same age as Taehyung and attending the same college. He laughed when your face scrunched in disgust at the harsh taste of the alcohol. “So innocent.” he murmured.

It didn’t take long for the effects of the alcohol to flow through you entirely and you were now looser. You laughed along to whatever Taehyung said, a hot feeling running through you. The man sees the glossy look in your eyes as you look at him with such innocent-like eyes and he does nothing but pat your head gently - you were someone he had to remain at a distance because you were his younger friend's sister.

“You like Tae.” Jungkook said to you once his friends had left and you and he were left alone. “He’ll never like you back, you know? Bro code.”

Your head is spinning slightly and all you can hear is the annoying voice of Jungkook ruining your vibe. You grabbed the bottle from his hands and took a messy swig of it. “Fuck you.” you slur.

Jungkook scoffs, his eyes racking your figure. You had taken off the hoodie you wore an hour ago and now stayed in a tanktop and shorts.

“No one likes me because of you.”

“That’s not true. Everyone likes you.” Jungkook had scoffed - he’s come across enough locker room talk about you.

“And no one wants to do anything with me because of you!” you hissed. You were drunk, Jungkook notes, and now your feelings were falling right into his lap.

“You should be thanking me. They just want to use you for your body. They can smell your virginity from a mile away.”

Your eyes widen and your body heats with embarrassment. Without thinking, you threw the bottle at Jungkook. It smashes against his chin and he releases a loud groan at you doing so.

“I-I’m sorry-” you didn't actually intend for the bottle to connect.

Jungkook presses his lips against yours, hands roughly grabbing your hips to keep you down. You’re shocked at the action and for a moment, you’re stuck on what to do or how to react.

You’ve kissed a boy before, sure, but not Jungkook - his lips are soft and not as chapped as the last boy you’ve kissed.

Jungkook pushes himself away as if realizing his mistake, his eyes are just as wide as yours and before he can apologize for his actions, you vomit completely on him, hot tears pouring down from your eyes. Now you’re truly embarrassed; humiliated. You were crying because the thought of kissing Jungkook sends shockwaves of both disgust and a taboo pleasure; and because you also vomited on him.

You ran to your room, stumbling a bit because the room was spinning entirely too much. You ignored Jungkook’s calls for you entirely and slammed your door shut.

You felt stupid, disgusted and humiliated all at once.

It was the following morning where you were forced to face Jungkook once more, now sober, and this time the boy refused to be ignored. You were fresh out of the shower, speed walking down to your bedroom where you were face to face with Jungkook, him sitting directly on your bed.

“Good morning.” Jungkook says cooly, his eyes on your face as if awaiting for your reaction.

“What are you doing here?” you ask, clenching the towel on your body tighter.

“Are you scared of me, Y/N?”

You’re taken aback by the question. “No.” you answer truthfully - there wasn't a reason to. Jungkook wasn’t a threat to you.

“Then why do you look like you’ve seen a ghost?”

“More like a roach.” you spit, and Jungkook chuckles.

“I want to talk about last night.”

You swallow, the room now growing hot. “What about last night?” you say, stepping into your room. “I got drunk…I don’t really remember what happened.”

Jungkook watches you intently as you enter your closet and crack the door gently. It was big enough for you to hide in it for a moment to grab a robe and return. “Did I do something to embarrass myself?” you laugh humorlessly.

You’re shaking with nerves and Jungkook knows you’re lying; pretending to not know what has happened.

“You don’t remember?” Jungkook furrows a brow, turning to you fully. You sit on your bed, back pressed against the headboard.

You shake your head.

“Hm.” Jungkook stands. “That’s too bad.”

You swallow a dry lump in your throat, a part of you wanting to question what Jungkook meant by “too bad”.

“You told me it was my fault that no one touches you.” Jungkook says after a moment of reading your face. “I’m sorry for that.”

Your body is hot; you remembered saying that. You remembered it all, as drunk as you were. You’re surprised you didn’t wake up with a hangover.

“It’s not your fault.” you murmur, glancing away.

“I know.” Jungkook snickers. “Still, I know how boys are, Y/N. I am one.” he says. “They’ll take advantage of you. They’ll use you just to get in your pants.”

The conversation was going left, you note. You and Jungkook never spoke about this - sex or boys or anything related. He once teased you for having a crush back in middle school and that caused you to push him hard in a puddle of mud. He was so embarrassed about “being pushed by a girl” that he told your father that he tripped instead.

“You should experience…” Jungkook trails off, as if trying to find the correct words to say. “...being touched by someone you love-”

“Please stop the speech.” you’re cringing, never in a million years thinking you’d hear this from Jungkook of all people.

“I’m being serious Y/N.” Jungkook comes around to sit directly in front of you, eyes watching you closely. “It’s better with someone you love.”

“Did you love anyone you,” you raise your hands to do air quotes. “touched.”

Jungkook snickers. “I’m a boy. We’re wired differently.” he brushed your question off. “You’re a girl. You’re not. You’ll grow attached to the person who takes your virginity and they’ll let you down. And as your brother,” Jungkook’s eyes zone in on you so deep that it catches you by surprise. “I’ll have to kill them.”

You roll your eyes - but goosebumps litter the skin of your arms. “You’re so unserious.” you respond. “Since when do you play the step-brother role?”

“Since now. I love you, Y/N.” Jungkook smiles, his teeth - that reminded you of a bunny - on full display. “That’s why I want to be the one to…touch you.”

Now, in this instant, you’re positive that you looked like you’ve seen a ghost. Your body is stiff and your eyes widen at Jungkook’s words. He doesn’t speak for a moment to allow your mind to think about the words he’s spoken.

“Excuse me?”

“Yes?”

Jungkook doesn’t appear as distraught as you - he was the one to suggest it.

“W-What are you saying?” you hiss at him, body hot. You’re sure this was another cruel joke Jungkook was going to push at you. He was going to burst out laughing at any minute and it was just a ruse to fluster you even more.

“I’m saying,” Jungkook tilts his head. “I want to be the one to pleasure you first.” he reiterates nonchalantly. “I can’t think of anyone that would love you more than me. You’re my sister-”

“Don’t call me that!” you hiss at Jungkook.

Jungkook furrows his brows. “Why not? Is it not true?” he asks. “You’re my step-sister. If you want to lose your virginity then I’ll be the perfect person to do so. I actually care for your feelings, don’t I?” he shrugs his shoulders.

You shake your head, mind trying to adjust to Jungkook’s words. “You’re crazy.” you scoff, but you glance away for a moment to think about what he’s said.

“You’d rather have sex with someone you don’t love than me?” Jungkook crosses his arms over his chest.

“You’re my broth…step-brother.” you respond. “It’s kinda weird thinking about you in that way.”

“Then don’t.” Jungkook shrugs. “Just think of me as Jungkook. We’re both seniors in High School about to graduate. Do you really want to go to college as a virgin?”

Going to college as a virgin shouldn’t bother you - you weren’t there to be fucked into oblivion countless times. However, your childish mind tells you that going to college without any experience was going to be your downfall. You think about Jungkook’s older friends - how Jimin called you innocent. How Taehyung lightly patted your head to dismiss you.

Jungkook watches your face fall and he understands that slowly, you were considering his proposal.

“We don’t have to jump into sex completely. Since you’re new to this I want to focus on your pleasure.”

“Like what?” you ask innocently.

Jungkook offers a soft smile. “You trust me, right? I love you and you love me.”

Slowly, you nod. You’re sure you did love Jungkook - knowing his since you were a child and growing up alongside him.

“Okay.” Jungkook nods his head, inching closer to your stiff frame. He places a hand onto your face. “It’s just me, remember. You don’t have to be scared.”

You nod your head hesitantly. You didn’t have to be scared, yet you were. The thought of doing anything sexual with Jungkook causes fear to run through your veins - getting caught in the act was yet another fear. Your father wouldn’t be returning until Monday afternoon, but that didn’t cause your nerves to cease.

Jungkook leans closer to press a kiss against your lips much like he did the night prior, only this time more gentle. His lips were what you remembered them to be - soft and…a hint of strawberry? Jungkook often wore chapstick so you weren’t as confused as you would’ve been.

You don’t move and allow Jungkook to completely take charge. “I’m going to continue to kiss you.” he murmurs breathily against your lips and you can only nod. But Jungkook doesn’t kiss your mouth, he instead kisses down your jawline to your chin and reaches your neck. “Lay down.” he instructs.

Your robe hikes up your thigh as you do as Jungkook tells you and it’s that moment that you remember that you were naked under the silk material - how you forgot was beyond you.

A hand touches your outer thigh and you flinch, nerves kicking back in.

“It’s just me.” Jungkook repeats against your neck. “Open your legs.”

It takes you a moment to listen to Jungkook. You’re trembling when you finally do open your legs and Jungkook takes it upon himself to wrap them around his waist.

Jungkook’s closer - the closest he’s ever been to you. You were naked right beneath him, the silk robe only reaching higher and higher up your thigh that you have no coverage whatsoever.

Jungkook’s sweats are thick, but he’s directly against your core and he could feel the pulsing from between your legs, similar to a heart beat.

Your skin is soft, Jungkook notes while both hands run beneath the robe. He inches up slowly, enjoying the way your breathing becomes heavy.

“Jung-” you don’t finish your speech and it’s interrupted by both of Jungkook’s hands engulfing your ass entirely.

Jungkook shudders at the feel of you. His sweats were becoming tight but he knows he cannot act on his urges - not when you were trusting him with this.

Jungkook’s kisses proceed to go past your neck, hands rising upwards to untie your robe. It falls open and now Jungkook has full access to your naked body.

“You have such a slutty body, Y/N.” Jungkook murmurs, his voice deeper than usual. You want to ask what that meant and if it was bad; but Jungkook doesn’t allow you to. His hands engulf your breast fully, his thumbs rubbing along your erect nipples.

“Does that feel good?” Jungkook asks, his eyes darting from your breast to your face.

You slowly nod your head, embarrassed at how good it did feel.

“Good.” Jungkook mumbles. Your breast felt as amazing as your ass and fit perfectly in the palms of his hand. His own breathing intensified, his cock throbbing to be released from the prison that was his underwear and sweatpants. “You’re aroused. I can feel your through my sweats.”

“Sorry-”

“Don’t apologize.” Jungkook snickers. “You’re supposed to be. Here,”

Jungkook wanted to feel you as much as he possibly could. He removes himself from you briefly, his warmth gone entirely that you slightly shiver. He then lowers his sweats enough so that he’s only in his underwear, his erection appearing painfully hard.

“You can grind against me. It’ll feel good.” Jungkook returns to you, left hand dipping to grip your ass and press you firmly against his clothed erection. The material of his underwear briefs are far more thin than his sweats and he’s thankful that he gets to feel some part of you.

While Jungkook’s left hand grips your ass, his left goes to rub along your breast, his thumb and index pinching your nipple for a reaction.

You yelp when you feel a new sensation - Jungkook’s tongue. He’s ensuring every part of you has a form of pleasure, his tongue swirling on your other nipple entirely.

Jungkook’s hips thrust into you, his eyes fluttering close. His pleasure could never match what you were feeling now, but even doing the deed - something so forbidden for step-siblings - was causing a wave of adrenaline and pleasure to flow through him.

The pleasure you were feeling was just as foreign, but you couldn’t deny how good it felt. You could feel the sticky arousal between your legs that’s staining Jungkook’s underwear. You couldn’t care now, not when you were matching Jungkook’s thrust with your own grinding.

This isn’t good, you tell yourself. Jungkook and you weren’t supposed to be doing this.

But it felt good - Jungkook’s tongue suckling on your breast, his hand gripping your ass so tight while he’s grinding against you.

“I told you it’ll feel better when you do it with someone you love.” Jungkook says against your breast, his tongue flickering out his lips to flicker against your nipple.

The amount of times Jungkook and you continued to engage in sexual acts should be unhealthy. It should have stopped after the first time - but it didn’t. You’re embarrassed to say that you came just by grinding against him, an act that Jungkook found so hot that he wanted to do it again and again and again.

The entire weekend was you and Jungkook. Slowly, you became comfortable with being with him. By the third day, you had since sat in his lap completely naked just in hopes of getting off - and Jungkook allowed it. He loved watching the way you succumb with pleasure, so wet and ready to cum that you didn’t care what he was doing. He had to mute his microphone on his game that he was playing with Taehyung, ignoring the screams his friend was shouting over the headset about their team losing because of him - but Jungkook didn’t care.

One thing Jungkook enjoyed was tasting you, as weird as it sounded. He’s done this before with other girls - but you were different. He enjoyed sucking and kissing on your kiss and watching your raw reaction to it. He’d place his hands upon your hips as you grind against his cock, his tongue rubbing along your soft skin. Your breasts were littered with hickies now and you didn’t care in the slightest.

But Jungkook is salivating at the thought of getting to taste you. He can feel how wet your are, your pussy releasing sweet arousal all over his cock that it’s a waste that he hasn’t tasted it.

The idea of you spread before him as he ravishes your pussy, your moans high and full of lust.

Jungkook is going to do so - now. He doesn’t care if you’re on the phone with your friends; you’ve interrupted him when he was on his game. He had to hear Taehyung berate him for an hour straight.

You’re already naked, Jungkook notes, and that’s good. While you and he started this only two days ago, you wanted him at every given moment and being naked was the quickest way for you to have him.

Jungkook enters your room without knocking and you furrow a brow at him. He doesn’t speak, he doesn’t need to. You know what he wants (in a way) and you’ll always be ready to give it to him.

What you aren’t expecting was Jungkook to pull your legs apart, and without warning, dive right into it. His tongue lays flat against your clit, his hands going beneath your thighs to assure you don’t close them.

You yelp loudly at the sudden action, a low groan releasing from your lips.

“I-I’m okay.” you tell your friend over the phone. “K-Keep telling me what happened.”

You mute your phone and place it aside. “W-What-”

“Shut up.” Jungkook tells you. He doesn’t want to think about anything but tasting you, having you cum all over his lips.

Your friend's speech dies down in the background. Jungkook doesn’t allow any time for you to adjust, his tongue laps between your folds hungrily. Your moans are as sweet as your pussy and he focuses on it and your pleasure entirely. He slurps and sucks against your clit as if it’s his last meal.

“Jungkook, I-I-”

Jungkook’s eyes flicker up to look at you and once more, you groan.

This is bad, you think. No, worse.

You told yourself that eventually, you and Jungkook would need to stop this. That you couldn’t keep allowing him to make you cum; but then he makes it harder. Grinding against him was one thing - still bad seeing as he was your step-brother - but this? This was worst.

And the worst felt so good.

“K-Kookie, please-”

You haven’t called Jungkook that since middle school - a nickname he hated as he grew older. But the name sounds so sweet coming from your lips that he just wants to ravish your pussy even more.

“What’s wrong?” Jungkook asks, then swipes his tongue against your clit slowly. He keeps his eyes on you as he does this, your reaction enticing him. “Want you to cum on my face.”

Your thighs quiver at Jungkook's words, body radiating with heat. Slowly you nod your head, slightly anticipating the new found pleasure Jungkook was giving you.

“It’ll feel good…” Jungkook says suddenly. “...might feel a little different.”

You’re unsure what he’s speaking of until you feel pressure. Your walls clench around his fingers, the feeling completely unexpected and unfamiliar.

“Relax, Y/N. It’ll feel good soon.”

Jungkook continues to lick on your clit, slowly entering his fingers deeper inside of you. You’re tight - the tightest he’s ever felt. But you were also a virgin and this was something he’s never had before. It excites him greatly, the thought of you giving your body to him; him being your first for everything sends shock waves through him.

You hum low and your thigh twitches. Jungkook's fingers are long and they’re now hitting a nerve deep inside of you.

Your back arches as Jungkook picks up the pace in his thrusting. His eyes never leave you as he does, enjoying the way your face contorts with pleasure. You’re beautiful, he thinks, as he always thought you were. Now you’re beautiful to him in more ways than one and your body has developed gracefully over the years.

Your eyes snap shut, a long moan releasing deep from your throat. You’re positive that this was going to make you cum quick - the quickest you’ve ever had.

“You’re so wet, Y/N.” Jungkook says, hovering above you. He doesn’t stop his thrusting fingers and his eyes are fixed on how good the sight of you is. “Aren’t you happy you agreed to this?”

“Yes!” you moan, nodding your head. There’s that familiar bubbling in your stomach creeping up on you.

“So pretty…” Jungkook groans. Your juices were leaking onto his palm entirely. He can’t wait until he could have you the way he wants to - to fully pleasure you the best way he knows how.

This isn’t something Jungkook ever wants to stop doing - the rush that goes through him at the fact that this is something you and he were not supposed to be doing. The forbidden action makes him want you even more - want you at times he truly shouldn’t and he ponders how he would react when you two were no longer alone.

Your thighs are shaking erratically and Jungkook knows you’re cumming. This must be bliss for you, he thinks, cumming so much in such a short amount of time. You’re just lucky that it was him - someone who truly loved you - that was doing this for you. Another person wouldn’t care if you came or not.

Jungkook presses a kiss against your lips as you ride out your orgasm. He sends them across your cheek to your neck as you slowly begin to calm down from your high. “I think your friend hung up.” Jungkook says, eyes glancing at your discarded phone.

You don’t respond, exhaustion hitting you drastically.

Jungkook pecks your lips once more. “Next time, I want you to sit on my face.” he says to you, removing his fingers entirely.

This was bad, you think. But you didn’t want it to end.

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