After her husband passed away, Rieko has been living with her daughter and her husband. After a few years, she has finally gotten used to things and is able to live a settled life. One day, her eyes fell on her son-in-law's bulging crotch. It was surprisingly big. She wondered why she hadn't noticed it before, even though they had been living together until now. Rieko was surprised. From that day on, she couldn't help but be curious about her son-in-law's son. By chance, when her daughter went out and her son-in-law was taking a nap, Rieko couldn't help but play with her son-in-law's son. The lively cock was hard and shiny as Rieko had expected, and the blood flowing through it made it twitch and twitch, as if inviting her, and Rieko couldn't help but run her tongue over it. After playing with it for a while, it violently released a cloudy white liquid into Rieko's mouth. Rieko, who had taken it all, tasted it in her mouth for a while in a daze.