Sumire, who lost her husband, ended up living with her daughter's family. Although they had a harmonious cohabitation, Sumire had one worry. That was her daughter's and son-in-law's nightly activities. It's good that they get along well, but every night Sumire would hear her daughter's voice of pleasure and could only feel frustrated, spending nights comforting herself alone. Sumire was curious about the lower half of her son-in-law who satisfied her daughter every night. One day when her daughter went out, Sumire peeked into her son-in-law's room and found him in the middle of masturbating. Sumire entered the room, calmed down the flustered son-in-law, and said 'I'm sorry to interrupt,' as she reached for his lower half…
