A few years have passed since she lost her husband. Then her daughter got married, and Yuri felt a lot of weight lifted off her shoulders. Her daughter and her husband were getting along well, and she thought she would soon have a grandchild. However, every night, she could hear the sounds of her daughter writhing in pleasure as she had sex, and she unwittingly soiled her underwear. Then, Yuri became curious about how good her daughter-in-law's penis was, and she secretly peeked on her daughter and her husband having sex and masturbated...