Sayuri lives in a two-family house with her daughter and her husband. In addition to being a housewife, she occasionally worked as a swimsuit model through an acquaintance of hers. One day, Kunio, her son-in-law, was masturbating with her in the swimsuit she had used. Apparently, his husband's penis is too big and their marriage is not going well. However, Sayuri's big cock caught her eye and she told him that it was for her daughter, and she persistently invited him day and night. Kunio, who had spent his days in the care of such bewitching obscene behavior, was unable to resist...