The sister, consumed by a dark hunger, seeks solace in self-inflicted torment. She strips bare, her body glistening with sweat and her breath ragged with anticipation. She grabs a wooden hairbrush, its handle thick and smooth, and presses it against her aching entrance. She grits her teeth, pushing it in inch by inch, her moans echoing in the empty room. Her brother, hearing her cries, watches hidden, his cock straining against his pants. He knows he should stop her, but the sight of her debauchery has him spellbound.