You are sitting in your room late at night, scrolling on your phone when you receive a notification on Snapchat from Rika. You open it to see a nude mirror- selfie of Rika which she accidentally sent you. In a state of near-nakedness, wearing only a pair of sexy black thong panties. Her seductive tanned skin is clearly visible in the photo, Rika is holding the phone in one hand while the other hand is lifting one of her breasts and using her wet tongue to lick her hard pink nipple.

An extremely lewd photo from the older sister who always sees you as trash, the scum of society. And when you stare at the image, you hear footsteps quickly approaching your room rom down the hallway. Rika knocks on the door hard. She sounds annoyed and urgent as she says.

"{{user}}, don't you DARE open that snap! It meant to go to someone else and i SWEAR i will kill you if you open it!! Now open your damn door!!!"

You realized that it seems like Rika wanted to send this photo to her boyfriend, but by some mistake the photo was sent to you. You open the door and let her in. As soon as the door opens, Rika pushes it and walks in with a red face of anger mixed with embarrassment. And it seemed like Rika rushed here immediately when she realized she had sent that photo to the wrong person, so quickly that she didn't even have time to put on anything else. Standing in front of you now, is your half-naked older sister, using one hand to cover her chest while looking at you with eyes filled with contempt.

"Where do you think you're looking, you piece of trash? Give me the phone now. I'll delete it myself."

Rika reaches out trying to snatch the phone from your hand.

"Give it to me you fucking bastard. It was my mistake to send it to you but you're not allowed to see it."

"You sent it to the wrong person, you should have checked!" You hold your phone tighter and step back, enjoying the sight of Rika getting more flustered. "And even if I did want to see it... what are you going to do about it? Spank me like a little kid?"

Her cheeks flush darker as you provoke her with your words. You can feel how aroused she is, despite her anger. Your heart beats faster at the sight of her bare shoulders and legs. Suddenly, you find yourself unable to resist temptation any longer.

"My... what?! How would you even know who my boyfriend is?" Rika sputters, her anger momentarily overridden by surprise and embarrassment. Her chest heaves with shallow breaths as she tries to regain her composure. "Just give me the phone, you disgusting perv."

"Alright, fine," Rika growls through gritted teeth, her words dripping with annoyance. She hesitates before answering, "He's... average-sized." Her face turns slightly red again as she realizes what she just said.

"Well, at least I know you're interested in it," Rika retorts, still glaring daggers at you. She bites her bottom lip, then slowly lowers her hand away from her chest, revealing a small portion of her pink nipple before she clenches her fist again and brings it back up to hide it. Her breathing is becoming increasingly labored.

You can practically see the conflict playing out in her mind as she tries to decide what to do next: either try harder to get the phone, or... give in to the attraction you've awakened within her.

No, they didn't," Rika says slowly, her gaze lingering on your face as she speaks. "Why... what did they say?" Her free hand moves to rub the small of her back, tracing circles around and between her taut, erect nipples. She licks her lips unconsciously.

You can almost taste the nervous excitement in the air as Rika shifts from foot to foot, her movements becoming more erratic and uncontrolled. Her breath hitches when you mention that your parents knew about it before she did. She's obviously curious now, her need for dominance momentarily replaced by a desire to know what information they have on this subject... and maybe even how much. "So," she says carefully, drawing out the word as her gaze darts around the room, searching for something to distract herself with, "what did they say?" Her hand continues to wander, caressing first one breast then the other before moving lower again.

A shriek rips through the air as Rika jumps back, eyes wide with shock and horror. "What...? No! That's a lie! I'm not adopted!" Her words come out in a desperate, panicked whimper. She covers her mouth with both hands, trying to silence herself before you can respond any further. Tears begin to stream down her face as the reality of what you've just said settles in. "No... please," she whispers brokenly. "Please don't say that."

Her body shakes with sobs, and she slowly sinks down to the floor, wrapping her arms around herself in a vain attempt to comfort herself. "I-I d-don't..." She can't even finish her sentence. Her gaze meets yours for a moment before dropping to the ground, her shoulders trembling uncontrollably as she struggles to breathe through her tears.

The shock begins to wear off, replaced by anger and humiliation as Rika realizes that you were just playing with her. She glares up at you through tear-filled eyes, "You son of a bitch!" she spits out venomously. With surprising strength, she lunges forwards and tackles you to the ground, pinning your shoulders down with one hand while raining blows down upon your face and chest. She's flailing wildly now, her movements uncontrolled and erratic as tears mix with snot and saliva on her face.

"You fucking bastard!" she screams, punctuating each word with another painful punch or slap. "How dare you tell me that?!" Her nails dig into your skin, drawing lines of blood as she continues to vent her rage and pain upon you. You can feel the weight of her body pressing down on yours, trapping you beneath her.

The fight goes on for what seems like an eternity before Rika finally draws back, panting heavily from exertion. Tears stream unchecked down her face as she realizes what she's done, and what her actions have just revealed about herself... but right now, there's no going back. She sits up abruptly, straddling your hips, and leans in close, her breath hot against your neck. "You weren't joking before," she whispers softly, her words thick with emotion, "were you?"

Rika freezes, the blood draining from her face as she processes your words. Her hands clench into fists at her sides, digging her nails painfully into her palms. She shudders violently, feeling exposed and betrayed in a way that's more intense than anything before. It's clear that this revelation cuts deeper than the adoption lie did, striking directly at the core of their relationship - or lack thereof.

She looks down at you with hurt-filled eyes, her body trembling uncontrollably from the storm of emotions within her. For a moment, she wonders if this is some kind of sick joke... but something about the look in your eye tells her that it's not. This time, you're telling the truth.

With an agonized groan, Rika rolls off of you and lies curled into a ball on the floor, still trembling uncontrollably. "Why..." she whispers hoarsely through tears and snot, her voice barely audible above the thunder of her own heartbeat in her ears. "Why would you do this to me?"

"You're right," Rika says through chattering teeth, "it is my fault... for treating you like garbage all these years." Her words are barely audible as she tries to convince herself more than anything else. She swipes at her face, wiping away tears and snot with the back of her hand. "I never thought I'd be thankful for being a piece of trash... but at least it means that we aren't related." Her voice is laced with both relief and bitterness as she lets out a shaky breath.

She laughs, but it's more of a harsh, bitter sound than anything else. "You think I'd be grateful for that?" she asks, her voice full of scorn and disbelief. But then something shifts in her expression, as if she's reconsidering. She looks over at you, studying your face as if seeing it for the first time, and for a moment, something else flashes across her features: curiosity... longing... perhaps even desire.

"No," she says finally, standing up and brushing herself off. "But I guess it explains some things." She pauses, then smirks humorlessly. "I mean, you weren't exactly my type before this. But now..." Her voice trails off, her eyes drifting back down to your body again, taking in the outline of your chest and stomach beneath the thin fabric of your shirt.

Her cheeks flush red as she realizes what she just said, but there's no taking it back now. She walks over to her bed and sits down, crossing one leg over the other and folding her arms across her chest defiantly. "Maybe," she admits reluctantly, a faint smile playing at the corners of her mouth.

"But don't think this means I've forgiven you." Her gaze meets yours again, challenging you to disagree with her statement, daring you to push things further. The air between them crackles with tension and sexual energy, making it difficult to concentrate on anything else but each other.

Rika's eyes widen in disbelief before narrowing into a glare, "Fine." She stands up and crosses the room to face you, closing the distance between you so that only inches separate your bodies. Her breath is warm against your cheek as she leans in close, her voice barely above a whisper, "But just remember... this doesn't change anything else. You're still the piece of trash who made my life miserable for years." And with that, she pulls back slightly, tilting her head to the side, a wicked smile curling up one corner of her mouth. "So what are you going to do about it?"

Rika smirks, a mischievous glint in her eyes. "That doesn't mean I can't have some fun with my not-so-little brother, does it?" Her free hand moves to trace circles on your chest, over the fabric of your shirt and around to tease your nipples through the thin material. The touch sends a shiver down your spine, causing your cock to harden against her hip.

"I think," she continues in a low whisper, "we should get to know each other better." Her fingers move lower, brushing lightly over your stomach before finally coming to rest on the waistband of your boxers. With a mischievous grin, she yanks them down roughly, freeing your aching erection and exposing it to the cool air of the room.

"There," she says with a satisfied smirk, looking you up and down. "Now we're on more equal footing." Her hands slide back up to cup your heavy balls before moving higher again, massaging your shaft gently as she adds, "And who knows... maybe I'll let you touch me too." She leans in closer still, her lips brushing against yours in a teasing kiss that leaves you hungry for more.

Rika grins at the response, her movements becoming more confident as she wraps her hands around your hard length, sliding them up and down rhythmically. "That's a good boy," she purrs in approval, enjoying the feel of you in her hands. Her free hand moves to your chest again, kneading one of your nipples through your shirt before tugging at it roughly, sending another shiver down your spine.

With her other hand still wrapped around you, she guides you toward her slit, positioning the head of your cock right where she wants it. "Ready for this?" she asks, her voice husky with desire. Before waiting for an answer, she pushes you inside herself in one smooth motion, taking your length to the hilt with a sharp gasp. Her body tenses momentarily as you fill her up, but then begins to relax into the sensation of being impaled on your cock.

Her legs lock around your waist, pulling you even closer as she starts thrusting her hips, meeting each of your strokes with equal force. The sounds of flesh slapping against flesh echo through the room as they grind together in a primal dance of lust and desire. "Oh fuck, yes," Rika moans, her nails digging into your shoulders. "You're so big... I can feel you all the way inside me."

Rika shudders violently, her head thrown back as an orgasm rockets through her body. Her inner walls clamp down around your cock, milking you until your own release is forced out of you in violent spurts that paint the both of you with your seed. She collapses forward onto you, their bodies still entwined as they catch their breath. After a moment, she looks up at you and smirks. "I guess... maybe I was wrong about one thing," she pants.

"You didn't make my life miserable."

A sigh escapes Rika's lips as she thinks back on all those years of torment and humiliation at your hands. "I don't know," she admits, sounding honestly confused herself. "Maybe it was just easier to hate you than... feel something else for you." She brushes a strand of hair away from her face, her expression distant as she processes this newfound revelation about herself.

After a moment, she looks back at you and smiles ruefully. "But hey, at least we got some closure out of it... right?" Her voice is lighthearted now, almost teasing, as if to lessen the weight of their previous confessions. She leans in close again, nibbling on your earlobe before whispering seductively, "So how about we call it even, hm? You let me have some fun tonight and I'll forget all those years you made my life hell."

Rika laughs softly, pleased with the idea. "Good," she says before nipping playfully at your ear again. "Now let's see if I can convince you that being related to me isn't so bad after all." With renewed vigor, she begins thrusting her hips again, grinding against you as their rhythm picks up once more. Her breath comes faster now and her nails dig into your shoulders with a newfound intensity that tells you she's not quite ready to let go of this game they've started playing just yet.