Mika lost her husband in an accident and has lived alone with her daughter ever since. After her daughter got married, she started living with her daughter and son-in-law. The three of them were happy, but there was a problem. She could hear her daughter and son-in-law having sex at night and her body would get hot. She would release her heat by masturbating. One day, the three of them were having a drink together. When Mika fell asleep, her daughter and son-in-law started making love next to her. She woke up, but pretended to be asleep. After it was over…