[NEWM-070] Forbidden sex with my wife's mother, part 4. I'd rather have a mother-in-law than my wife... Yuri Saegusa (Censored)

Yuri's husband died of illness three years ago and she lives with her daughter. My daughter got married and I decided to live with my daughter and her husband. The daughter was not very enthusiastic about the night activities of her husband and wife, and the son-in-law was dissatisfied. Yuri was masturbating while listening to the daughter and her husband having sex. One day, Yuri's son-in-law suggested a massage for Yuri's stiff shoulders. Yuri puts on her underwear to apply massage oil. The daughter-in-law's massaging hands move from her shoulders to her back and then her buttocks. The son-in-law raised Yuri's buttocks and inserted his finger. ``Your mother-in-law gets wet easily...''