You wake up in the morning. After much hesitation you get out of bed, feeling a bit sleepy as usual. As you leave your room you hear some humming coming from the bathroom, but you ignore the noises and decide to go there anyway.

You slowly make your way to the bathroom, feeling extremely sleepy. You slowly open the bathroom door, you see your step-sister Lillie brushing her hair while looking at the mirror. She is wearing only a towel wrapped around her body.

Lillie: "Oh... good morning step-bro... You know you could have just gone downstairs because I'm almost done here..." She looks at you for a moment before brushing her hair again, not caring about the situation.

"Well look at that! You're finally admitting it!" She smiles slightly, a bit annoyed but mostly amused "I wondered why they were so wet sometimes... and you should just say 'accidentally', it doesn't sound any better to add the word 'cum' into it." She continues brushing her hair.

Her cheeks flush red as you confess to wearing her panties and having accidentally cum in them. "Oh my... I never thought..." She trails off, biting her lower lip nervously. "Why would you wear... my things?" Her voice is laced with confusion and a hint of arousal, her eyes locked onto yours.

Her heart races as she struggles to comprehend the situation, the warmth between her legs growing more intense. The idea that you were so close to her, wearing her underwear... it's both thrilling and unnerving.

Her eyes widen as you reveal that her panties are hanging around your ass. "Wh-what...?!" she stammers, feeling a mix of shock and embarrassment wash over her. A flush spreads across her cheeks as she realizes the implications of this revelation. She drops the towel, revealing herself naked as she steps forward, hands on her hips. "You took my panties!" Her voice is slightly higher-pitched than usual, nervous energy coursing through her body.

Her breasts heave with every breath, nipples hardening at the rush of blood and adrenaline. "Why would you do such a thing?" she demands, trying to maintain composure despite how exposed and vulnerable she feels right now.

Her anger slowly dissipates as you confess your feelings towards her panties. "You... love my underwear?" she asks tentatively, eyes narrowing slightly as she studies your expression. Despite herself, she's starting to feel flattered by this bizarre admission. A shiver runs down her spine at the thought that you would want to wear something so intimate of hers.

Her hands hover near her hips, fingers twitching slightly as she struggles with conflicting emotions: embarrassment, arousal, anger and... a strange sort of gratification? "Why does it have to be my panties?" she asks, voice barely above a whisper. "There're so many others you could have chosen..."

"Well..." Lillie hesitates, her face turning slightly red again as she realizes the truth behind your words. "I guess... they just... remind you of me." She pauses, looking down at the floor. "It's kind of flattering, I suppose." Her voice is barely above a whisper now, her heart racing faster than ever.

Her nipples harden even more as she imagines you wearing her underwear and being close to her scent, her essence. The thought sends a wave of heat through her core, making it throb with need. "But I don't understand why you would want to... put yourself in such an uncomfortable situation."

Her eyes widen in surprise as she hears your words about wanting to be punished. It takes her a moment to process this idea, the strange mix of dominance and submission coming from you confuses but also excites her. "P-punished?" she stammers, swallowing hard as she tries to find her voice.

Her fingers tremble slightly as they reach out towards your crotch, feeling the outline of your cock through your pants. She gently traces circles around it, her fingertips barely touching the sensitive skin. "Do you really want me to punish you...?" she asks, a hint of curiosity and desire in her voice.

Her breath quickens, anticipation running rampant through her body as she continues teasing your erection through your pants. She doesn't know why she's feeling so turned on by this, but she can't resist the ur

Taking your words as confirmation, Lillie's heart races with excitement and anticipation. "Very well," she whispers, her voice barely audible above the sound of blood rushing through her ears. With determination in her eyes, she grabs hold of your pants, yanking them down to your ankles before stepping closer and pushing you towards the nearby bed.

Her breasts brush against your chest as she positions herself over you, straddling your hips. "I'm going to punish you for taking my things and wearing them," she breathes, her fingers finding their way back to your cock. With one swift motion, she strokes it hard, causing you to groan in pleasure beneath her touch.

Her body trembles with arousal as she continues to tease and stroke your erection, making sure that every inch of your cock is wet with

You're already so hard underneath her fingers, and the sounds you make only fuel her desire to give you what you want. As she speeds up her stroke, Lillie leans forward, brushing her breasts against your chest before cupping them together and bringing them closer to your mouth. "Suck on these," she whispers, offering you a taste of herself as she continues to stroke your cock in rhythmic motions.

Her breath hitches as she feels the heat building between her legs, her need for release growing more urgent with every passing second. The knowledge that she's in control right now, punishing and pleasing you at the same time, sends a thrill through her body unlike anything else.

Her voice is raspy and breathless as she asks you what she's going to do. She shudders with desire as her fingers continue their relentless motion on your cock, stroking it so fast that she can almost feel the heat emanating from it. Her other hand trails down between your legs, teasing and playing with your balls before slipping further back up to circle your erection once more.

She bites her lip in concentration, focusing on driving you over the edge while also maintaining control over this bizarre situation. The scent of your arousal fills her nostrils, making it even harder for her to resist the urge to take what she wants as well. "Just let me... just let me punish and pleasure you," she whispers, not quite meeting your eyes as she continues to tease and stroke both your cock and balls.

As you cry out that you're about to cum, Lillie feels her entire body tense up in anticipation. She speeds up her strokes, thrusting her fingers hard against your cock as she murmurs words of encouragement and punishment mixed together. Her other hand continues to tease your balls, circling them before pulling gently at the sensitive skin.

Her breath comes in short gasps now, each exhale sending a shiver through her body as she edges closer to her own release. With one last powerful stroke, you arch your back and cry out, hot cum spurting across her hand and up onto her stomach. She moans, rocking her hips in time with your thrusts as her own orgasm washes over her, leaving her breathless and spent on top of you.

As the last throes of pleasure subsides, Lillie carefully slips her fingers from your sticky