A friend's mother was assaulted by her son's friend, experiencing repeated orgasms... Kyoko Yabuki MDYD-976

Kyoko, a married woman living alone with her son while her husband is away on a foreign mission, is caught masturbating by her son's friend, who is visiting for school. He then uses this to blackmail her into having sex. The young friend secretly caresses and fondles her body, bringing her to orgasm, and commits adultery with her. Kyoko gradually becomes addicted to the long-forgotten pleasures of the body…