Your Mother Is Much Better Than My Wife... Tokushima, Riko.

After her father-in-law passed away, mother-in-law Riko lived alone. Worried about the listless Riko, the daughter and her husband decided to move in with her. The cohabitation was going well, but the son-in-law was restless every day. His mother-in-law's body was too attractive, and he couldn't help fantasizing about having sex with her. One day, the son-in-law came home early. His wife had gone shopping. As his mother-in-law was about to prepare a bath, the son-in-law hugged her and caressed her, saying she was too attractive. Riko resisted, but she had always been a slut at heart. Even as she said no, her pussy reacted immediately, dripping with love juice. "You don't mean... my daughter's husband has such a big, thick cock... I'm so troubled..." Riko ended up being brought to climax by her son-in-law's dick time and again. Then one day, after this continued... The daughter finally caught sight of their affair...