In a cramped shower stall, French siblings explore their forbidden desires. The sister, Michelle, slips in first, her body glistening with water. Her brother joins her, his eyes wandering over her soapy curves. She reaches out, wrapping her hand around his growing erection. He hesitates, but she whispers, "It's just us, no one else." They start slowly, her hand stroking him, his fingers finding her clit. The water cascades around them, their moans echoing in the small space as they give in to their taboo lust.