Mother Rei lives happily with her daughter and her husband. However, her underwear is lost, and her son-in-law Takeshi witnesses her masturbating with it. It seems that the lack of sex between the couple is the cause... Rei sympathized with his big dick, which was never used, and seduced Takeshi while saying, ``I'll help you in place of my daughter.'' Even though she knows that she is the mother of the bride, she still