Rui's son was deeply obsessed with his mother's large, shapely ass. Every day, he masturbated using an ass-shaped sex toy, but his true desire—to touch his mother's body—grew too strong to suppress. One day, after finishing housework, his mother collapsed face-down on the floor, exhausted. Seeing her helpless form, the son gave in to his uncontrollable urges, lifting her skirt and groping her plump buttocks. His cock quickly hardened, and he began grinding his erect penis between her cheeks, eventually climaxing with a creampie-like cumshot. Awakened by the sensation, the mother was shocked at first—but soon found herself unable to resist, as her son's cock, far larger than her husband's, continued thrusting deep inside her.