Under the roof of their shared home, a brother and sister indulge in a taboo dance of lust. She teases him with glimpses of her curves, and he responds with a growing bulge in his pants. One evening, they find themselves alone, the air thick with tension. She tentatively reaches out, touching his hardness, and he moans, pushing against her hand. Their bodies press together, clothes shed, as they give in to their bi-curiosity, fucking hard and raw until they collapse, spent and guilty, in each other's arms.