Reiko's daughter got married last year and she was living alone. Two months ago, her daughter asked her if she wanted to live with her and her husband, so she started living with them. Reiko was lonely and was grateful to her daughter and her husband. However, hearing the couple having sex every night made her body ache and she was frustrated. One day, her daughter went out alone and her husband was left at home with a sore back. Reiko decided to give him a massage. Reiko's technique made him get an erection. Reiko noticed and reached out to him, saying it was her fault...