In the dimly lit hallway, a brother and sister, Jay and Sarah, exchange furtive glances. Sarah's eyes flicker to Jay's crotch, his prominent bulge betraying his lust. They retreat to Jay's room, Sarah pushing him onto the bed, straddling him. She grinds against him, her panties dampening. Jay pulls down her top, exposing her pert breasts, suckling them eagerly. Sarah unzips his jeans, releasing his throbbing cock, stroking it tentatively before taking it into her mouth. Jay groans, fingers entwining in her hair. Just as he's about to cum, they hear their mother's footsteps, freezing in panic.