"What!? My sister is peeing in the bath!" Out of curiosity, the brother peeks at his sister taking a bath. Then he sees his sister peeing defenselessly! Excited by the sight of her pussy, the brother attacks her. At first the sister resists, but when she sees him, she becomes aroused by her brother's erect penis! The brother and sister are both fired up, so they hide from their parents and indulge in forbidden incest in the bathroom.