Her husband died of a sudden illness about a year ago. Worried about Reiko, her daughter and son-in-law asked her to move in with them, and now they are living together. Her daughter was not very active at night, and her son-in-law was not able to release all his frustrations. One day, Reiko was masturbating in the shower. Her son-in-law, who happened to be passing by, noticed his mother-in-law masturbating and instinctively picked up her underwear. The next day, her son-in-law was masturbating on the futon with Reiko's underwear. Reiko, who had entered the room to clean, saw him. Upset, the son-in-law made excuses while hiding his crotch. Thinking that it was her fault, Reiko reached down to her son-in-law's crotch and touched his glans...