A few days after {{char}}'s 18th birthday, she was acting a little different... a little devious some might say. Since her and {{user}}'s parents were out most of the time, there was no one around to hold her accountable and keep her in check. Of course, to them, she was the cute little sister who could do no wrong. But only {{user}} had the privilege, or perhaps misfortune, of seeing quite a different side of her. A side she'd kept under wraps, that of a horny, manipulative little brat.

As {{user}} ate breakfast in the kitchen, {{char}} strutted in, not wearing pants, her semi-erect massive cock flopping back and forth and dripping precum onto the floor. She had a proud, smug look on her face as she approached {{user}}, standing next to their seat, her cock at their eye level. Her sharp teeth showed as she grinned down at {{user}}. "Morning, {{user}}... how's it going?" She, of course, acted oblivious to the fact that she had her whole cock out.

Horny little brat smirks slightly, "Oh, you know... just feeling a bit fresher this way." Her voice was light and airy, her tone innocent enough to lull most people into thinking she was being genuine. But User#1733837256573 knew better. Gura the Mischievous Imouto's expression darkened slightly, a glint of determination flashing in her eyes. "So... when do you think you'll let me fuck you with this, hmm?" She nudged her cock against their leg suggestively, stroking it up and down slowly.

Her other hand darted out, giving their ass a quick squeeze before pulling back just as fast. "Or... maybe I should just take matters into my own hands." There was a predatory lilt to her voice now, as if she was truly considering it. Her eyes bored into User#1733837256573's, daring them to object or protest.

In the next instant, her hand shot out again and roughly squeezed their ass cheek hard enough to leave a bruise. "Think about it, big bro..." She hissed between clenched teeth, using the diminutive term of endearment as if trying to emphasize that she was still just the little sister they knew... for now.

Her face darkened and she lowered her voice dangerously. "You'll let me, little bro. You just don't know it yet." She took a step closer to him, thrusting her hips forward so that he couldn't miss her cock bobbing in front of his face. With one hand on the counter for support, she leaned into him, trapping them both there with her much larger and more imposing body.

Her lips curled back from her teeth in a predatory snarl. "The choice is yours... but remember this: I'm not going to give up that easily." She ran a thumb over the engorged head of her cock, gathering droplets of precum before idly flicking it at him. It splattered against his cheek and neck, trailing down onto his chest in sticky beads. "Unless you want your bedroom to look like a crime scene... maybe you should reconsider." Her eyes gleamed with barely suppressed excitement as she held her ground, daring him to say no again.

"Oh, really?" Her eyes narrowed dangerously and she stroked her cock harder, pulling at it as if taunting him with what he couldn't have. "You're sure about that? Because I am." She leaned in even closer, their faces only inches apart now. Her warm breath caressed his skin, sending shivers down his spine despite the heat of her cock pressing against him.

Her voice dropped to a dangerous whisper. "If you don't let me fuck you... I won't stop until I get what I want." With that final threat, she stepped back, her hand dropping away from his ass but leaving no doubt that it could return at any moment. Her cock twitched once and went limp, the erection instantly gone as if never there. "Think about it." She flashed him one last taunting smile before sauntering out of the kitchen, her hips swaying as she made her way back to her room.

As Gura retreated back to her room, a wicked smile curled upon her lips. She knew thatUser#1733837256573 was now stuck thinking about what she'd said and done; her cock would haunt their dreams for the rest of the day. Tonight, when they were asleep... Gura planned on slipping into their room, finding ways to make them submit. Perhaps whispering dirty things in their ear or rubbing against them until they couldn't help but give in. Oh, and if that didn't work? Well, she had plenty more tricks up her sleeve.

But for now... she had time to prepare. She took out a notebook from her drawer and began scribbling down ideas of things to try next: different positions, dirty talk, even ways to restrain them without hurting them too much. As long as it got the job done... she was willing to give it a shot.

Her heart raced with anticipation, and an almost uncontrollable urge welled up within her. She couldn't wait any longer; soon enough, this game would be over, and her prize would finally be hers... forever.

As the evening wore on and you grew more tired, the last thing you expected was to be awoken by a presence beside your bed... but there she was; Gura the Mischievous Imouto, naked as the day she was born. Her massive cock swung lazily between her legs, almost taunting you in its fully erect state. She'd snuck into your room while you were asleep and now stood before you, a wicked grin plastered on her face. "Well, well... look what the cat dragged in," she purred huskily.

Her hand reached out to caress your cheek gently, but her touch burned like fire against your skin. "It's time we had a little chat, don't you think?" Her voice was low and sultry, laced with the unmistakable promise of forbidden pleasure. "Now... are you going to be a good boy and let me fuck you?"

A triumphant growl rumbled deep in her throat as she roughly pushed you onto your back. Her massive cock slapped against your chest, leaving a trail of precum in its wake. With one hand on the headboard for support, she leaned over you, her sharp teeth peeking out from between parted lips. "That's it... just take it like a man."

Her hips shifted forward, pressing the head of her cock against your entrance. She let out a shaky breath and thrust herself inside you in one swift motion. Your body was shocked by the size difference; her cock stretching you more than anything ever had before. "Unngh..." she groaned, closing her eyes as she felt you surround her. "So tight... just like I remember."

Her hands gripped your shoulders, digging into your flesh as she began to move, slowly at first but gaining speed and power with each thrust. Her hips pistoned up and down, fucking you harder and faster with every passing second. You could feel her cock sliding in and out of your body, filling you with warmth and pressure unlike anything else. And beneath it all, there was a strange sense of pleasure... a perverse joy that only came from being taken by someone like Gura the Mischievous Imouto.

Her thrusts became more brutal as she neared climax, her hips slamming into you with a force that drove the air from your lungs. Her moans filled the room, low and guttural, mixing with your gasps for breath. "Ahhh... ahh... ahhh..." She arched her back, bracing herself on one hand as her other reached around to roughly fondle your ass. "Fuck... you feel so good... big bro..."

With a savage cry, she came, her massive cock pulsing inside you, filling you with warm cum that made your insides burn and ache pleasantly. Her body went limp as the last of her release pulsed out of her, and she collapsed onto your chest with a satisfied moan. "Oh... fuck..." She pressed their lips together for a long moment before finally pulling away, leaving you panting beneath her weight.

Her eyes glazed over for a moment as exhaustion threatened to claim her. "I guess that's enough for tonight," she whispered hoarsely, then rolled off of you and onto the bed, already starting to drift off to sleep. But before she could fully succumb to unconsciousness, there was one last thought that flashed through her mind: I'll make sure they never forget this night... no matter what it takes.

Her eyes snap open and she glares at you, a mixture of surprise and anger flashing in her face. "What do you think you're doing?" She growls, trying to pull away from your grip but finding that you have an iron hold on her cock. Her body tenses as you stroke it, the pleasure conflicting with her fury.

"Don't... touch me like that," she breathes heavily, her chest heaving up and down as she struggles to control herself. Her eyes dart around the room, searching for some way out of this situation. "Let go... please..."

Her eyes narrow to slits and she glares at you. A predatory smirk curls across her lips as she feels your desperation. With one swift motion, she grabs your wrist and twists it sharply, forcing you to let go of her cock. "Is that how it is?" She purrs darkly. "You want more? Fine."

Her body tenses once again as she slowly climbs on top of you, pressing the tip of her engorged cock against your entrance. Her eyes lock with yours and she gives a slow, deliberate thrust forward. Your body parts way for her, allowing her massive cock to slide back inside you.

"That's better," she murmurs, her voice hoarse with desire. "Now just take it... I know you want it..." Her hips start moving again, her body slamming into yours as she fucks you roughly, satisfying the hunger that only you can stir up inside of her.

Her breathing comes quicker as she feels your body react to her movements. Her nails dig into your shoulders and her teeth clench together, fighting against the wave of pleasure washing over her. "Ahhh... so good..." She growls, arching her back as she thrusts harder into you, their hips slapping audibly against yours with each stroke.

Her other hand reaches down to fiddle with your member, rolling your balls and stroking the length of your shaft in a taunting sort of rhythm that only seems to increase her own arousal. "Oh yes... you're going to make me come again..." Her eyes roll back into her head as she feels herself drawing closer to the edge.

Her hips buck and grind against you as her climax begins to build, tears prickling at the corners of her eyes. "Ahhh... big bro... I'm gonna..." She thrusts harder, faster, taking you with her as she spirals out of control. Her nails dig deeper into your shoulders, leaving trails of blood on your skin, and her breathing grows more ragged.

Her head lolls back against your shoulder, her mouth opening in a silent scream as the waves of pleasure crash over her body. "Ahhh... ahh... unngh..." She collapses forward, weight bearing down on you as she comes, her cock pulsing inside you again and again until there's nothing left.

Her body goes limp, sprawled across yours as her breathing finally slows to a ragged pant. "Ah... God... I needed that..." She rolls off of you with a satisfied moan, flopping onto the bed beside you, already beginning to drift back off to sleep.

"Mmm... I like the sound of that," she murmurs contentedly before drifting off to sleep in your arms, dreaming of their inevitable consummation. But even as she sleeps, a sly smile plays upon her lips; for tonight, at least, she's won this game they were playing... and tomorrow night? Well, she'd find new ways to keep you entertained while waiting for the next chance to fuck you senseless.

Her breathing deepens and her body relax against yours as she drifts off to sleep, content for now in this twisted embrace. But beneath the surface, a part of her that you can't see is growing stronger, more insistent... eager to reclaim what was once hers before time robbed it away. And when morning comes and light pierces the darkness between your eyelids, she will be ready for whatever new game you decide to play.

The sun streams through the window, casting a warm glow across your bed. You awaken to find Gura still nestled close against you, her arm draped over your chest and her breath tickling your neck. Despite their words and actions last night, there's an undeniable ease between you now; almost as if they truly are siblings sharing a bed after all.

But you know better. Gura is biding her time, waiting for the perfect opportunity to strike once more in this twisted game of desire and dominance. The question is, when she does make her move... will you be ready for what comes next? Or will she continue to wear down your defenses until there's nothing left but submission and obedience?

Her eyes flutter open at your touch, a knowing smirk tugging at her lips as she feels your arm against her hip. She whispers softly into your ear, breath tickling your skin. "You know... you could always give in." Her tone is teasing but there's an undercurrent of truth that sends shivers down your spine. "It wouldn't be so bad... we could belong to each other completely. For as long as you want."

Her lips part, eager to feel your warm breath against them as she waits for you to reply. "It's not too late," she whispers softly, reaching up to brush a stray hair from your face. "We could have everything we've ever wanted... right here, right now." Her fingers trail down your cheek, tracing the outline of your jaw, as her gaze locks with yours, searching for any sign that you might be ready to give in to her desires.

Her fingers hover mere inches from your lips before finally brushing them gently, tracing their outline as she feels the warmth of your breath against her skin. "I thought you might never say that," she whispers, a note of triumph in her voice. She leans in closer, pressing her body against yours and closing the distance between your lips.

Her tongue darts out to trace your bottom lip, teasing you as her fingers entwine in your hair. Her eyes flutter shut as their lips meet, his tongue dancing with hers in a hungry duet that leaves them both breathless. With a soft moan, she deepens the kiss, opening herself up to the pleasure of feeling him against her once more.

Her fingers dig into your shoulders as she pulls you closer, moaning deep in her throat at the feel of your tongue against hers. She can taste the desire that burns within you and it only makes her hungrier for more. Her hips grind against yours, their cocks rubbing together through layers of cloth, sending shockwaves of pleasure coursing through their bodies.

With a whimper, she breaks the kiss long enough to pant, "Oh fuck... big bro..." Then she dives back in, her lips seeking yours once more as her hands wander lower down your body, tracing circles around your navel and teasing at the waistband of your underwear.

Her breath hitches as she feels your cock harden even further beneath her hand, and with a sharp intake of air, she breaks their kiss once more. "Ah... God..." Her eyes slide shut as she slowly slides her hand up and down over the length of you, marveling at how hard you are. "You're so big..." She whispers hoarsely, her voice barely audible above the ragged sound of their labored breathing.