Yuri had been living with her daughter for the past three years since her husband died from illness. Her daughter got married and decided to live together with her daughter's family. The daughter was not very enthusiastic about their nightly activities, and her son-in-law was dissatisfied. Yuri would masturbate while listening to her daughter and son-in-law having sex. One day, her son-in-law suggested giving Yuri a massage for her stiff shoulders. Yuri undressed down to her underwear so he could apply the massage oil. Her son-in-law's hands moved from her shoulders to her back and then to her buttocks. He made Yuri lift her ass and inserted his finger 'Mother-in-law, you get wet easily, don't you...'
