In the quiet of their shared room, siblings explore the forbidden. She touches herself, her moans soft, inviting. He watches, entranced, his own hand moving to his cock. She catches him, her eyes widening in surprise, then desire. They come together, her hand around his shaft, his fingers buried in her pussy. Their bodies writhe, sweat-slicked, as they chase their orgasms, their taboo union a dance of lust and shame.