Chapter Text
It’s late at night on a school night but instead of doing her homework she’s watching her little sister film herself again. She hates it but she can’t stop watching as she masturbates along with her. She watches her sweet little face twist and contort in pleasure as she uses a vibrator to stimulate herself in front of a live audience.
It almost feels like a private show just for her, if not for the fact that other strangers are watching along with her. Probably beating off to her Ruby like she’s doing right now.
The thought makes her uncontrollably angry and possessive as she sits at her desk and jacks off for the third time that night. Her dick is getting sore from the way she roughly grips it with her hand but this will be the last wank of the night.
At least she had tried to convince herself of that two masturbation sessions ago.
It had all started a few weeks ago when Ruby had entered her first year in college. She had been noticing changes in her little sister’s behavior and her appearance had changed drastically over time.
She had cut her hair, spiking it and dying the tips red but that’s not even the worst of it. Ruby had started wearing makeup which she never bothered with before. It’s like she’s an entirely different person now with her smokey eyeshadow and ear piercings.
Their parents had complained about her outfit choices lately too but it’s not like they can tell her what to wear since she’s an adult. They have never been very strict and always spoiled Ruby because she was the youngest but look what a lack of discipline does.
All her outfits are so short and tight fitting, showing way too much skin. It’s hard to keep her eyes off her now and conceal her own desires.
She had chalked it up to Ruby being rebellious but when she heard some guys in class talk about her sister's only fans she had nearly lost it and wanted to break both their jaws right there.
She had to see if it was true so she did her own research and after a little digging through social media, had found Ruby’s only fans linked to an account that she didn’t know about.
Against her better judgment she had signed up anonymously and subscribed, convincing herself it was only out of concern for her sister but the more videos she watched the more hard she had gotten. Her dick stirred in her pants and grew in size until she couldn't take it anymore and began to jack off.
She had quickly spiraled out of control and has been beating her meat for hours instead of studying for a test she has tomorrow.
She furiously strokes herself as she watches her little sister writhe on the bed, her legs spread wide apart and soft mewls escaping her lips. It's like she's calling out to her from the other room, needing her to come over and fill her with dick.
Yang thinks back on memories of the two of them growing up. How Ruby used to be so sweet and innocent.
Now she’s whoring herself out online to get money from strangers.
She loves her sister but lately all she feels is bitter jealousy. These videos should be for her eyes only.
The slut is even wearing a choker now and she imagines snapping it by forcefully ramming her cock down her throat.
The mental image is too much for her to handle and she’s cumming all over her hand, thick spurts shooting out to coat her abs and her keyboard.
She pants and ignores the shame that washes over, you think she would have been used to it by the third time but she isn’t.
Grabbing some tissues she cleans up the sticky mess left behind.
No matter how many times she cums by her own hand, it’s never enough. She blames her sister for turning her into a disgusting freak that lusts after her own flesh and blood sibling.
She stares at the screen in front of her with a curled lip, her teeth grinding down in frustration.
If Ruby wants attention so badly then maybe it’s time to pay her dear sister a visit next door.
Pulling her boxers over her half chub she leaves her room, going across the hallway to where Ruby resides.
She lingers outside the bedroom door, listening to the younger girls muffled moaning and pushes her way inside without any warning.
It takes Ruby a second to notice her standing there but when she does she jumps, trying to cover herself with a pillow to make up for her lack of decency. It almost makes her laugh.
“Yang! What are you doing in my room?!” She hisses. “Don’t you knock?”
Ruby looks miffed and embarrassed, her breathing is labored and her cheeks pink at being caught with her pants down but her minor annoyance doesn’t compare to the anger Yang feels.
She folds her arms across her chest and scowls.
“Oh am I supposed to knock now? I didn’t realize we’ve grown so far apart, Rubes.”
“Can we not do this right now? I’m kind of busy here.”
“Yeah, making your little peep shows online. I know all about it.”
Ruby gasps as dread fills her chest and it makes a sick satisfaction twist inside her.
“Please don’t tell mom and dad, Yang.”
Yang smirks and walks over to the foot of the bed as Ruby shuffles closer, giving her best impression of a kicked puppy. Maybe that look would have worked on her when they were younger but she’s not so easily fooled anymore.
“I won’t but you have to do something for me first.”
Ruby rolls her eyes and huffs.
“Fine. What is it?”
She tugs down her boxers and her full erection springs forward, nearly hitting her little sister in the face with it.
“If you want to act like a whore online, then you need to put some real work in and suck my cock like you mean it.”
Ruby’s eyes widen at Yang’s massive hard on, her member already twitching with need under her scrutiny. She’s never seen one in the flesh before and it’s a little intimidating. Yet she can’t deny it also makes her curious to feel it in her mouth.
She licks her lips unconsciously.
“You’re joking, right?”
Yang growls and slaps her in the face with her musky cock, the sweaty scent of her balls overwhelming her and nearly making her gag.
“Do I look like I’m fucking joking Ruby?! Start sucking me off already!”
The blonde girl grips the back of her choppy hair and pushes her head down until her lips land on the tip of her cock. Sparks of pleasure shoot up her spine and her heart races at the anticipation even when Ruby struggles desperately to free herself of her older sister's strong grasp.
“No! Stop! I don’t- grk!”
Her pathetic whines get cut off by her thick meat being shoved down her tight throat. She keeps pushing until Ruby’s nose brushes up against the blonde hair of her pubes and feels her gag around her, making her throat clench down on her length.
She can see her throat bulge as she thrusts steadily in and out of her warm wet face hole. The choker around her neck strains with every movement and it’s the hottest thing she’s ever seen in her life. Better than anything her imagination can form for fap fuel.
“Fuckkk Ruby.” She moans, moving her hips faster to face fuck her sister with wild abandon.
“This is what you get for being such a fucking t-tease.”
Tears collect in the corner of Ruby’s eyes as her mascara starts to run down her face. She tries to relax her throat and gulp down more air but is only greeted with more cock being shoved in. It feels humiliating to be treated so roughly, by her older sister no less.
It’s like she’s nothing more than a flesh light for Yang to empty her balls in.
Yang bundles her hair up into one fist as her thrusting becomes more frantic, staring down into her sister’s gorgeous silver eyes her dick begins to twitch more often with the urge to release.
“I’m cumming sis! Take my whole load!”
She shoves her cock all the way until it hits the back of her throat and convulses, spurting hot cum out in thick ropes.
“Glg!”
Ruby panics as she has no choice but to hastily swallow down the warm load, pressing her hands against Yang’s muscular thighs she tries to give herself some breathing room.
The older girl just holds her head in place, easily overpowering her younger sibling and soon Ruby gives up fighting altogether. Letting Yang use her mouth and obediently swallows down every last drop of cum.
Finally after what feels like an eternity of her older sibling pumping down her throat, she lets go of her head and Ruby pulls her mouth off her dick with a breathless gasp.
She coughs and glares up at the blonde, who looks back with a dopey grin.
“Aw don’t look so sour Ruby, I think your viewers liked it.”
Her heart sinks in her chest, she totally forgot she never turned off the livestream. Her fans have been watching this whole time and she’s completely mortified. At this point it might have been less humiliating if Yang just tattled to their parents.
“Dammit Yang! You did that on purpose, didn’t you?”
“Just think of it as your big sis helping you out with your new hobby. You’re welcome!” She says way too cheerfully.
“Alright alright I get it already! I’m ending the stream now.”
But before she can close the stream Yang grabs her by the hand to stop her.
“Wait Ruby, look at the view count.”
She wants to ignore her older sister but her curiosity wins in the end. Her jaw drops when she sees the amount of viewers and all the new subs she’s gotten over the past few minutes. She’s never had this many people sub during one of her streams before.
“Think about all your new fans that you’ll disappoint if we stop now. You don’t want that, do you?”
“W-what? But I thought you wanted me to stop?”
“Maybe I did at first but… I’m not done teaching you a lesson yet.”
She reaches out to grab her little sister by the throat, Ruby lets out a surprised gasp as she captures her lips in a bruising kiss.
Her tongue invades her mouth and Ruby whines helplessly, her thighs squeeze together as Yang licks around every corner of her mouth. Her thumb brushes up against the column of her throat to fiddle with the edge of the choker she’s wearing.
It feels like a threat, or maybe a promise.
The two of them separate from the melty kiss and take in greedy gulps of air. Yang ducks her head down to brush her lips softly against Ruby’s ear.
“I’m going to show everyone who you belong to.” She whispers huskily with a possessive tone.
It makes a shiver travel down Ruby’s spine and her body grows hot. She can’t do much else besides whimper submissively since her brain has shut off from those words.
Yang hooks a finger into her choker and drags her down the rest of the way onto the bed, the action almost feels like a dog being pulled along by its owner.
“Get on all fours, Rubes. Let’s give the people a show they’ll never forget.”
She does so hesitantly yet obediently, presenting her round ass to Yang and the view is glorious. Even if Ruby is acting like she doesn’t want this she can clearly see her arousal glistening and dripping down her thighs.
Yang removes her own shirt and doesn’t miss the way her little sister watches her the whole time, her hungry gaze lingering mostly on her toned abs.
She gulps nervously as her older sibling crawls onto the bed, stalking up to her like a predator.
“Yang, maybe we should stop this… I’m still a virgin and this feels wrong. I don’t want my first time to be like this.”
Okay she must be doing this on purpose now because that immediately charged her up. Ruby has been tempting her for so long now that she isn’t leaving this room without utterly wrecking her.
She never realized before how scared she was that Ruby had already lost her virginity to some dumbass jock at school. It makes her feel a lot better about taking it for herself now.
“Wow, that’s hard to believe since you act like a total skank online. But good, that means I get to cum inside your pussy raw.”
She gets on her knees behind her little sister and lines the tip of her cock up with her soaked entrance.
“Wait! You’re not even gonna wear a condom?!”
“Nope!”
Without giving Ruby a moment to prepare herself she shoves her dick inside, making the girl below her stiffen up immediately at the sudden intrusion.
Her walls are so warm and velvety that she abandons the idea of moving slowly and starts pounding her pussy recklessly, her thick hips meeting with her rear over and over again.
Her wet cunt is drawing her in further, making her dick reach deeper into her core to places where Ruby can never reach herself. The tip of her cock kissing her womb like a battering ram.
Ruby lets out a wailing moan at the rough treatment, burying her face into the sheets so nobody can see her humiliating position.
It doesn’t get past Yang though.
“Oh no, don’t hide!”
The older girl pants as she reaches a hand down to curl her fingers around her throat again, lifting her head up so that she’s forced to stare back into the camera as she fucks her hard and fast.
“Let them watch as I breed you Ruby.”
Right as she says that she feels her dick pulse in warning, every time she squeezes down on her throat her sister's insides wrap around her tighter. Her body is begging to milk her for everything she has.
Yang grits her teeth as the pressure builds to an unbearable level and she’s about to blow another thick load. This time deep into her guts.
“I’m cumming in my sister's unprotected pussy! I’m knocking you up in front of everyone!”
She sheaths herself deep until only her balls are hanging out and Ruby feels warmth shoot into her lower belly as her big sister's seed fills her up.
“Oh Yang! Oh fuck! Ohhhh my goddd!”
Her eyes roll back into her skull as they let out a long groan, both of them equally lost in a twisted haze of pleasure as they cum together.
Yang huffs in exhaustion as she pulls out and is only thoroughly satisfied when she watches semen leak out of her little sister’s abused pussy.
Ruby lies there on the bed motionless as her breathing begins to even out, it seems she has fallen asleep.
With a tired sigh, the blonde goes to the laptop mounted on the desk and shuts off the camera.
Her heart aches a bit at what she’s just done but she can’t deny how incredible it felt. Going back to the bed she tucks Ruby in with the blanket and presses a lingering kiss to the girl's sweaty forehead.
Hopefully her sister isn’t too upset with her in the morning since she did help her gain quite the fanbase. If anything she should be thanking her and begging to do more.
In fact she would be happy to help her film for new videos in the future if Ruby agrees to their new… partnership? Relationship? Whatever they are now.
What’s better than the two of them profiting off a little sisterly bonding? It would be fun for the whole family.