The sister, craving forbidden fruit, corners her brother in the hallway. Her eyes locked on his crotch, she feels her own wetness. She presses against him, feeling his growing hardness. 'You're not a saint, are you?' she teases, her breath hot on his ear. He's powerless, his cock straining against her thigh. She grinds against him, her panties soaked, ready to lead him down the path of incestuous pleasure.