Sayuri Hayama is invited by her mother-in-law who wants her son-in-law's big dick all the time.
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, her son-in-law Kunio was masturbating with her in the swimsuit she used. Apparently, his husband's penis is too big and their marriage is not going well. However, Sayuri was captivated by his huge cock and 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...
