Juri, a mother who has raised her daughter on her own since her husband passed away. Her daughter grew up to be a fine young woman and got married, but she continued to live with Juri. One day, while they were living an ordinary but happy life, she happened to peek at her daughter and her husband's nighttime activities and was shocked. Her adopted son-in-law, who was a gentle and earnest man, was making her daughter cum over and over again with his wild, intense hip thrusts. Seeing this brought back memories of her past as a sex addict and creampie slut, and she could no longer control her sexual desire...