A brother's solo session turns into a sister's voyeuristic delight. His strokes grow faster, his breathing heavier, as he edges closer to release. The room fills with the scent of sex and the sound of his pleasure. Finally, with a low groan, he comes undone, his cock pulsing as it pumps out rope after rope of hot cum. The sister, hidden but not forgotten, watches with rapt attention, her own hand buried in her panties, her fingers coated with her own juices, wishing she could taste his cum on her lips.