Siblings confined together in isolation find themselves drawn to each other, their bodies betraying their minds. The brother, bored and horny, starts to stroke his cock, the sound of his hand working his flesh echoing in the small room. His sister, hearing the rhythmic noise, can't help but sneak a peek. Caught in the act, they both blush, but the tension between them shifts. She retreats to her room, but the image of his thick, veined cock stays with her. She reaches down, rubbing her clit, imagining it's his touch. He hears her soft moans, and the cycle begins anew.