In the dimly lit room, a curious sister stumbles upon her brother's private moment, his hand wrapped around his throbbing, untouched cock. Instead of turning away, she's drawn to his innocence and the raw power he holds. She tentatively reaches out, her small hand barely able to encircle his girth. He gasps at her touch, his hips bucking slightly. Encouraged, she begins to stroke him, watching as his face contorts with pleasure. The room fills with their heavy breathing and the wet sounds of her hand working his shaft.