In a cramped, dimly lit room, two siblings, barely legal, give in to their forbidden cravings. The girl, tiny and innocent-looking, tentatively touches herself, her brother's thick cock throbbing in response. Caught, they clash, but desire trumps indignation. Naked, they face each other, the girl's eyes wide as she takes in her brother's size. They masturbate, the room filling with their soft moans and the wet sounds of flesh on flesh, until a voice from outside jolts them back to reality.