Yumi is in her 10th year of marriage (second marriage). She is a beautiful woman with irresistible I-cup breasts. Her husband is kind and takes good care of her, but they are currently not having sex. She is troubled by the fact that she sees her stepson as a man, not as a mother, and is aroused by him. She is a sexually frustrated pervert who masturbates using her son's used tissues and underwear as her sexual impulses.