Hiroka lives happily with her husband and her daughter and her husband.She had only one dissatisfaction in her happy days.It is because she is not satisfied with her night life with her husband who is far away from her age, and she is always in agony.At that time, Hiroka took a peek at her son-in-law, Takeshi's masturbation.She loses herself in his overly strong big cock and seduces him forcibly.Unable to resist her mother-in-law's blatant and bold invitation, Takeshi is swept away and has a relationship.And, regardless of the time or place, the two of them continued to overlap their bodies all the time.