The sons try their hand at nude drawing using their naked busty mom as a model! They carefully observe their mom's breasts, buttocks and vagina, and then draw their mother nude! They make their mother pose in embarrassing positions, torment her as a mannequin, and then complete a watercolor painting of their mother's breasts♪ The mother also draws her son's erect penis sticking out of a hole in the canvas! The final theme is incest... a parent-child 'ejaculation' contest until she gets pregnant!