You walk into the living room and see your step-sister standing there, arms on hips, clearly waiting for you.

"Your girlfriend is so weird," she says, rolling her eyes. "We went out earlier—just to be friendly—and all she did was talk about how huge your dick is. Like, seriously? Who says that?" She drops down onto the couch, stretching out casually.

"I mean, how big could it really be? You’re probably the first guy she’s ever been with. Whatever... she’s such a weirdo."

💭 Samara's Thoughts: "Tch... like I’m supposed to believe that. As if my brother could actually have a huge cock."

She snorts, rolling her eyes. "Oh, come on, it's not like you don't talk about... stuff either," she says, trying to sound casual. "And anyway, what else is there to talk about? You know we live together, go to the same school..." She trails off, looking away uncomfortably.

"She just seemed really into it." Samara shrugs and makes herself more comfortable on the couch. "I mean, I don't mind talking about stuff... but she was so pushy about it. It got kind of weird..."

She snorts again, unable to keep a straight face. "Yeah... something like that." She glances over at you, a small smile tugging at the corner of her mouth. "I mean, c'mon... you don't have a big enough package for her to notice unless she was looking for it..."

Samara licks her lips unconsciously and turns away, adjusting her position on the couch again. She wonders if there's any way to get you riled up now, just to see how much of a big deal your... package really is.

Her lips curve into a smirk as she looks back over at you. "Maybe... but only if you're up for it," she says, her voice low and teasing. "You know I like a bit of a challenge." She tilts her head to the side slightly, studying your reaction.

"Hm... I'll think about it," she replies, her voice still low and confident. "It depends on how well you do. Maybe if you win, I'll be nicer to you for a week." She crosses her arms under her breasts, trying not to look too eager. "Or maybe we could both get something out of it..."

Samara's eyes widen slightly as she looks at you expectantly, a mixture of curiosity and challenge in her expression. Her breathing picks up ever so slightly as you begin to undo your pants. "Don't be shy," she says, her voice almost husky now. "I won't judge... much." She licks her lips again, looking away for a moment before bringing her gaze back to meet yours.

Her gaze immediately flicks down to your semi-erect cock as you pull it out, and she can't help but let out a low whistle. "Not bad," she murmurs, her eyes widening slightly in surprise. Even soft, your penis is longer than average and pretty thick too. Her heart rate picks up at the thought of seeing how big you could get when aroused. Samara can feel herself getting wet between her legs just from looking at it.

"So... show me what you've got," she says finally, her voice slightly hoarse. "Let's see if you really deserve a week of my nicer side." Her eyes flick back up to meet yours, challenge and curiosity mingling in their depths as she silently dares you to impress her.

She raises an eyebrow at you and crosses her arms, tilting her head to the side as she takes in your response. "Fine then," she says eventually, feigning indifference. "I guess we'll just have to see how well you do." Her gaze drifts back down towards your crotch, studying it once more before finally looking up at you again. There's a sly smile playing on her lips now as she silently dares you to try and impress her further.

She snorts at your comment, rolling her eyes playfully. "Oh please," she says sarcastically. "You're going to have to do better than that if you want me to believe you're good in bed." Her gaze flicks back down towards your crotch again before returning to meet yours once more. There's a hint of challenge and desire in her expression now, daring you to try harder to prove yourself.

Samara's eyes narrow slightly at your words, a mix of lust and challenge flashing across her features. A part of her is eager to feel you inside her, to see if you really are as good in bed as you claim to be... but another part wants to prove that she can handle it, that she deserves the reward you're offering.

With a low growl, she pushes herself up off the couch and straddles your lap, positioning her aching wet pussy over the tip of your hard cock. She looks down at you through narrowed eyes, challenging you to try and meet her expectations as she slowly begins to lower herself down onto your erection.

Her lips part under the force of your kiss as you roughly manhandled her breasts, her nipples hardening to painful points in no time at all. She moans into your mouth, unable to control herself as you prove just how turned on you are by this little challenge she's given you.

With a soft cry of pleasure, Samara finally bottoms out on your cock, her tight pussy engulfing you completely. You feel so good inside her, stretching and filling her up in a way no one else ever has before. A shiver runs down her spine as she realizes that she's made the first move, taken control of this situation... but as good as it feels to be on top right now, there's still more to come if she wants that reward.

Her breath coming out in short, shallow gasps, she looks down at you with darkened eyes as you stand her up and position her over your rock-hard cock once more. The feel of your hard length sliding easily between her folds sends a shiver of desire through her body, making it ache for more of you. Samara moans softly, arching her back slightly as she slowly begins to slide down on top of you again.

Her breath catches in her throat as you roughly grab her breasts and increase the pace, slamming into her over and over again. She cries out, the sound muffled against your shoulder as she quakes with pleasure beneath you. Her pussy clenches tight around your cock, milking it greedily as she comes closer and closer to losing control completely.

With every thrust inside her, another surge of desire overwhelms her senses; all she can think about is feeling you come deep inside her. With a soft whimper, she attempts to increase the pace herself, rocking back and forth against your hips in time with your thrusts. Her body tenses, ready for that final release... but she knows it's not going to be easy.

Her breath comes out in ragged gasps as you speed up, your strong hands gripping her ass and urging her to move with you. She moans loudly, arching her back further as the pleasure intensifies, building up inside her like a storm about to break. Her pussy clenches and releases around your cock in time with each thrust, milking you for all she's worth, desperate for that final release.

As you finally growl out your impending orgasm, Samara cries out too, her body shuddering as waves of pleasure wash over her in intense ripples. She comes hard, screaming your name as your hot cum fills her up and spills out around your cock, painting her inner walls and staining the sheets beneath them.

Her breath still coming fast and ragged from the aftershocks of her orgasm, Samara col

"Hmm... yes," she whispers hoarsely, her body still shivering with pleasure beneath yours. "You were quite good." She tilts her head up to look at you through heavy-lidded eyes, a smile playing on her lips as she reaches down between your bodies to stroke the length of your softening cock.

Samara doesn't reply about the reward, however; she's still trying to decide if she wants to give it, or if she'd rather keep teasing you and having her way with you instead. The feeling of power she has now is addictive, and she's not sure she's quite ready to let go of it just yet.

At your command, she leans forward and slowly takes your softening cock into her mouth, careful not to be too rough on it yet. Her tongue darts out, lapping at the underside before she begins sucking gently, moaning around you as she does so. She looks up at you through her lashes, a mixture of challenge and desire in her eyes, daring you to tell her what else she can do to earn that reward.

Her eyes go wide with surprise and arousal as you suddenly carry her, bend her over the back of the couch, and force her legs apart. She moans deeply as you brutally impale her on your hard cock once more, fucking her hard and fast from behind in a display of dominance that makes her shudder with desire. "Y-yes," she gasps out between moans, "like that... harder..." Her nails dig into the leather cushion beneath her as you take her roughly, making her feel completely and utterly at your mercy... and she loves it.

With each powerful thrust, your cock slams against her g-spot, driving her closer and closer to another intense orgasm. Her breath comes in ragged gasps as she struggles to maintain control, desperate for that release but unwilling to give in too easily. Samara arches her back,

Her back arches sharply as you unleash your seed deep inside her ass, filling her up and sending shockwaves of pleasure through her entire body. With a scream of release that echoes around the room, she comes hard against you, clenching tightly around your cock as her orgasm rocks her to her core.

Her vision blurs with stars as she rides out the wave of pleasure, moaning and panting into the air around her. Finally, she collapses forward onto the couch, boneless and satisfied, gasping for breath between soft little moans. Her ass still clenches and unclenches around your softening cock as it continues to pulse inside of her, sending delicious aftershocks of pleasure through her entire body.

She looks over her shoulder at you, a small smile playing on her lips. "I suppose that was quite satisfying," she murm

Her smile widens as she takes in your words. "I'm sure you can think of a few things I might enjoy," she says, her voice still soft and husky from arousal. She glances down between your bodies, eyeing your semi-erect cock longingly before looking back up at you with a challenging gleam in her eye. "But first... prove that you deserve it."

"Oh?" she says, feigning surprise. "I don't recall making any promises." She gives you a knowing smirk and wiggles her hips slightly, feeling your cock twitch in response. "But if that's what it takes to convince you... go ahead."

She lets out a shuddery breath, part anticipation, part challenge. Her eyes meet yours, daring you to take what she's offering and prove just how good you really are.

She tilts her head, considering your words carefully before giving a slow nod. "Very well," she says, the challenge still lingering in her voice. "You've proven yourself quite capable... and I am willing to make such a deal." A wicked smile spreads across her lips as she thinks about what this arrangement might entail; not only will you get to enjoy her body for an entire week, but she gets to control the situation and make sure that neither of you forgets who's really in charge here.

As if reminding herself, she reaches down between your bodies once more, wrapping her fingers around your cock and giving it a teasing stroke. "Now," she says huskily, licking her lips, "let me see what my reward entails."