In the dim light of his room, a young man sits alone, his mind filled with thoughts of his sister. He's found her panties, discarded in the corner of her room, and can't help but bring them to his lips. They're soft, the fabric still warm from her body. He can smell her, and it sends a jolt of lust through him. His hand goes to his cock, stroking it through his pants as he imagines her in these panties, her body pressed against his. He can't hold back any longer, his orgasm ripping through him, leaving him panting and guilty in the aftermath.