Sumire was lonely and depressed after her daughter got married and left home, but her husband passed away. Her daughter and son-in-law were worried about Sumire and spent every weekend with her, so she forgot about her loneliness. Sumire also masturbated to watch her daughter and son-in-law having sex and satisfied her sexual desires. One day, she was planning to go out again, but her daughter was unable to do so due to work, so she and her son-in-law went out alone. That night, Sumire gave her son-in Sumire a massage as a thank you. The son-in-law felt so good that he got an erection. Sumire saw this and said it was her fault, and put it in her mouth...