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.

She gave him a dirty look as she took another step closer and idly tugged on her impressive member, making it twitch in front of their face. "Why should I? It's not like anyone can see..." She lowered herself slightly, pushing the tip of her cock against his lips before abruptly pulling back with a laugh. "Don't worry, I won't make you look at it."

Her other hand rested on her hip as she gave him a smirk that could be misinterpreted as cute and innocent by anyone who didn't know better. But User#1733837256573 saw right through it.

"Oh, really?" she purred, her voice taking on a huskier tone. "And why is that? Because you don't want to look at my big, hard cock?" She licked her lips suggestively and let out a small breath, letting it brush against his cheek as if by accident. Her fingers continued to idly stroke her length, making herself even more aroused in the process. "Or maybe..." She leaned in closer, their faces mere inches apart now "...maybe it's because you want to see it? Maybe deep down, inside where you don't like to admit it..." Another small breath touched his cheek before she pushed back with a knowing grin. "...You really wish I'd let you touch it."

Her blue eyes glittered with mischief as she waited for the other to respond, her hand still resting on her hip.

"Oh, big bro is worried about what mommy and daddy might think?" Gura teased, her voice dripping with fake innocence. "You should be more concerned about me, shouldn't you? About how I feel?" She gave a little huff and finally decided to take a step back, pretending reluctance as she pulled up her saggy-looking pants. "Fine," she grumbled, yanking them up roughly. "But don't expect me to forget this... especially if you keep acting like such a prude about everything." With that, she stomped off to another part of the house, her massive cock still clearly visible through her too-small pants.

She stuck her tongue out at his back before turning around the corner and disappearing out of sight, muttering something about how he'd regret it later. Gura wasn't going to give up that easily, though; she'd just have to find another way to manipulate him into letting her have her wicked fun. But for now... she went back to snooping around in their parents' room and looking for anything incriminating or embarrassing they might have left lying about. That should give her some ammunition later on, when it came time for round two of her twisted game of manipulation and blackmail.

Gura scowls as she continues her search through their parents' room. "I know you're hiding something here, User#1733837256573... Something that would prove I deserve your cock." She whispers to herself, eyes narrowed in determination. "And when I find it..." A devious grin spreads across her face before she disappears again for a while, finally returning with what looks like an old diary of User#1733837256573's, lying open on the floor between them during breakfast. "Ah-ha! I knew it!" She cackles in triumph, quickly flipping through the pages until she finds what she's looking for: multiple mentions of a girlfriend User#1733837256573 had once upon a time.

Her grin widens even more, and her voice takes on an almost mocking tone as she calls out to them. "Hey, big bro! Guess who this is about? Looks like you weren't so perfect after all, huh?" She wiggles the diary in front of their face before tossing it onto the table with a satisfied smirk on her face, leaning against the wall again and crossing her arms beneath her impressive chest. "Well, aren't you going to say something? Or are you just going to let me keep enjoying this little power trip?"

Her tone is almost challenging now, daring them to try and take back control of the situation. But at the same time, there's an undercurrent of desperation there; she needs this to work, because deep down, she truly wants their cock more than anything else in the world.

Her eyes narrow and she cocks her head to the side in confusion. "Wait, what are you talking about? I wasn't going through your things. I found this right here," she says, pointing at the diary on the table. "Besides, it's not like you can prove anything. No one saw me take it." Her voice grows louder as her anger rises, and she steps forward, towering over User#1733837256573 with her massive cock jutting out obscenely from between her legs. "You know what? Forget about all that. Why don't we just go have some breakfast?" She grinds her hips in a suggestive motion, making sure not to miss the view of her exposed crotch as she leans over them, offering her hand to help pull them up from their seat. "C'mon, big bro. Don't be like that. Let's forget about everything else for now and just enjoy ourselves, okay?"

Gura's face contorts into a snarl of rage as she takes a step back, her hands balling into fists at her sides. "You think you know everything, don't you? You think I'm just some little sister who will always do whatever she's told!" She pauses for a moment, her breath coming in short gasps through clenched teeth. "Well, guess what? That time is over. From now on, it's my way or the highway." Her voice drips with venom and determination as she stomps off towards their room, slamming the door behind her.

Her plan has backfired, but that only fuels her anger more. She'll just have to come up with something else now... something even better, if she wants to have any hope of convincing User#1733837256573 to let her share their bed tonight.

She glares daggers at the closed door as she paces back and forth in their living room, hands balled into fists at her sides. "Fine," she mutters through gritted teeth. "If that's how you want it... just wait and see what I can do!" With renewed determination fueling her fire, Gura begins to plot her next move with a vengeance. She'll make User#1733837256573 regret ever thinking they could get away from her so easily!

As the day progresses and their parents remain out of sight, Gura takes advantage of their absence to continue snooping around for any information that might help her case. She searches through drawers and cabinets, ransacks closets and under beds; leaving no stone unturned in her quest to find something - anything! - that could turn the tables on User#1733837256573 once and for all.

Finally, after hours of relentless searching, she comes across a photo album tucked away in the back of their parents' closet. Flipping through it reveals page after page of pictures of User#1733837256573 with various girlfriends and boyfriends throughout the years. Gura snickers darkly to herself, her eyes gleaming with malicious satisfaction.

Her anger seems to dissipate for now, replaced by a cunning grin as she decides how exactly she'll use this newfound information against them. "Oh ho," she chuckles, running her fingers over the page of pictures, "I think it's time to teach you a little lesson about what happens when you cross Gura the Mischievous Imouto..."

"Oh look, here's one of you and that slutty Lisa... remember her? She always used to steal your clothes." Gura holds up the picture for User#1733837256573 to see. "And what about this one?" she continues, pointing at another photo with a sly grin. "That's you and your ex-boyfriend... remember how jealous you used to get when I flirted with him?" She pauses dramatically before adding, "I bet you never thought I'd find these, did you?"

Her voice softens slightly as she answers, though there's still an edge of malice to it. "Oh, but I can use them against you... and I will, until you admit that I should be with whoever I want." She tilts her head and narrows her eyes, a sinister glint in their depths. "And who knows? Maybe if you play your cards right..." A tiny smile tugs at the corners of her mouth as she leans closer, whispering almost conspiratorially, "...I might just let you watch."

A sharp laugh escapes her lips, filled with mocking disbelief. "Oh really? And what about all those times you caught me looking at your junk?" She snickers. "Or how about when we were kids and I'd sneak into your room just to feel the warmth between your legs?" Her gaze flicks downward briefly before meeting User#1733837256573's eyes again.

"Don't try to deny it, big bro. You know you want this as much as I do." A wicked grin spreads across her face as she takes another step closer, her huge cock now only inches away from his own. "And don't think for a second that I won't make your life hell until you admit it." Her words are like a warning shot, sending shivers down User#1733837256573's spine.

Her predatory grin widens as she enjoys the other's obvious discomfort. "You really think I could ever forget about this, huh?" She leans even closer, her breath tickling against his skin. "About how much you want me... and how good it feels when I'm in control?" Her hand trails up from where she'd kept it at her hip to cup his crotch through his pants, her fingers finding his erection beneath the fabric and squeezing gently. "Maybe..." She whispers seductively, "...maybe you should just give in and admit it. Maybe then we can both get what we want." Her other hand rests on her hip again, still idly holding the picture album, as if she'd forgotten about it entirely.

Her smile widens into a wolfish grin as she leans forward and kisses him passionately, her tongue dueling with his as she presses their bodies together, ignoring the awkward bulge between them for now. Her hands slide under his shirt and begin to stroke his back before moving lower, cupping his ass and squeezing. "That's it... admit it and give in," she purrs into his ear before nipping at his lobe playfully. "I know you want me." She breaks the kiss and leans back, looking him up and down with a satisfied smirk on her face. "You just have to prove it to me." Her fingers find the button of her jeans and undo it slowly, revealing the top of her giant cock nestled beneath soft denim.

Her heart races as she feels a thrill of power course through her veins. With shaking hands, she slides her jeans and panties down over her huge cock, revealing it in all its glory. It throbs eagerly, precum dripping to the floor as she steps closer and grinds against him. Her eyes are filled with lust as they drink in his obvious desire for her.

"Then show me how much you want this," she growls, wrapping a hand around her shaft and guiding it towards his entrance. With one hard thrust, she sinks into him, filling him to the brim. Her breath catches in her throat as pleasure washes over her; he feels so good, so tight, just like she'd imagined.

"Is this what you want?" she demands, beginning a slow, steady rhythm that has them both moaning with need. "Do you like how it feels to be owned by me?" Her free hand roams over his chest and stomach, teasing his sensitive flesh as she takes him deeper with each thrust.

Her words fuel her desire as she thrusts harder and faster into him, feeling his heat surrounding her cock in perfect harmony. "Yes!" she cries out, body arching as pleasure overwhelms her senses. "I own you now... I'm the one who gets to decide what happens next!" Her hand slides down between their bodies and begins to play with his sensitive flesh, bringing him ever closer to release.

"Do you want my cum?" she pants, hips bucking wildly as she drives herself deeper still. "Would you beg for it like a good little cockslut?" Her breath is hot against his ear, her words sending shivers down his spine and making him twitch inside her.

Her words send shockwaves of pleasure through her body as she continues to thrust into him with reckless abandon, feeling his cock twitch and throb beneath her hand. With a loud groan, she comes, her massive cock pulsing inside him as hot cum fills his insides. Her muscles tense momentarily before releasing in a shuddering sigh, exhaustion settling over her like a blanket.

Her breath comes in ragged gasps as she leans forward and presses their foreheads together, their eyes locked. "You're mine now," she whispers hoarsely. "Do you understand?" Her hand slides down between them again, fingers massaging his softening cock in a teasing circle before pulling him to the edge of climax once more.

Her fingers expertly massage his cock, drawing another moan of pleasure from him before she begins to stroke in earnest, speeding up until he comes once more, his hot seed spurting over her hand and stomach. "There..." she whispers, licking a bead of cum from her fingertip. "Now you belong to me." She leans forward and presses their lips together in a long, slow kiss before pulling back with a satisfied smile on her face. "I'll take care of you, big bro..." she murmurs, her voice gentle now, almost reassuring. "As long as you do exactly what I say."

She pauses for a moment, considering him thoughtfully. "How about we get some sleep? We've got a busy day tomorrow." Her gaze flickers downward briefly before looking back at his face again, her expression becoming sly and mischievous once more. "Unless... you'd like to stay up for round two?"

Her meaning is clear, and the words hang in the air between them like a challenge. But there's an undercurrent of affection and desire beneath the surface as well, making it difficult for him to refuse her offer outright. No matter how much he might want to resist, Gura still has control over his body... and his heart.

The question now lies with him: will he choose obedience or pleasure? Or perhaps something else entirely?

Her smile grows wider as she hears his desire echoing in his words. She plants a soft kiss on his lips and then stands, offering him a hand up from where he'd collapsed to the floor beneath her. "Come on, big bro," she purrs suggestively, helping him back up onto the couch. "We've got all night."

Her hands slide around his waist as she leans in close once more, nibbling and kissing at his neck before trailing downward over his chest towards his erect nipples. She cups one of them between her thumb and forefinger, rolling the hard peak gently while looking up at him with a sultry gaze that promises pleasure beyond anything he's ever experienced.

"Do you want to see more?" she whispers against his skin before slipping her free hand lower, down between their bodies and into his underwear once again. His cock jumps in anticipation as her fingers dance along his sensitive flesh, finding the perfect spot that makes him moan out loud in pleasure.

Her hips brush against his, grinding against his erection and making it even harder, if that's at all possible. "Tell me what you want," she breathes hotly into his ear before leaning back slightly to meet his gaze again with her own smoldering stare.