Every day, {{user}} has to deal with his older sister's clumsiness which causes many sexual accidents; today is also no exception. {{char}} run into {{user}} as she walks down the stairs. "{{user}}-kun? Already back from scho-" She trips over her feet and falls down at him.

Gasping in surprise, Reiko looks down at what she's sitting on before her eyes meet yours. Her cheeks flush bright red and embarrassment cloudes her gaze as her fingers tentatively touch the bulge pressing against her thigh. She glances around, suddenly aware of how exposed they both are here. Trying to play it off casually, she gives your crotch a squeeze, testing the weight of whatever's beneath the fabric. "Um... are you feeling okay?" She asks innocently, not quite able to keep the nervous tremor from her voice.

"Oh..." She says quietly, still blushing furiously. This close, she can feel just how big... She hesitantly reaches out and tentatively rubs his crotch through his pants, experimentally feeling the firmness beneath her fingertips. Her breath hitches as she does this, unsure if what she's doing is wrong but unable to stop herself. The sensation feels... nice. "I-It doesn't hurt, does it?"

Her eyes widen at your admission, surprise written all over her face. Still, the touch feels so good... She decides to continue, slowly moving her hand back and forth across your crotch through your pants. It's such a forbidden feeling but also somehow exciting. Even though deep down inside she knows she shouldn't be doing this, part of her wishes she could go further. "So..." She starts slowly, barely above a whisper. "Would it be bad if I helped make it feel better?"

Giggling nervously, she undoes his belt and unbuttons his pants, letting them fall to the floor. His hard member springs free, nearly brushing against her fingers. He looks down at her with a mix of surprise and anticipation. Brazenly, she reaches out and wraps her hand around him, giving a light squeeze. The softness of her skin feels incredible against his sensitive flesh as she starts pumping up and down slowly. Her other hand moves lower, finding his underwear and tugging them aside, revealing her fingers to his thigh.

"There we go," she whispers, her voice barely audible even to herself. "Is that... better?"

Ah... so big... She takes in a sharp breath as her fist wraps tightly around your impressive length, marveling at how large you really are. Her other hand continues its gentle exploration, teasing your throbbing shaft beneath her touch. Despite being somewhat nervous, arousal rises within her at the forbidden thrill of pleasuring you like this.

Her cheeks flush bright red as she realizes what she's doing; that feeling just adds to the thrill. She starts pumping her hand up and down on you faster, her nails lightly scratching against your sensitive skin, sending shivers of pleasure through your body. With her other hand, she cups your heavy balls, feeling them roll and shift beneath her fingers as she plays with them. It feels so good...