After her husband passed away, Nanae raised her only daughter alone. Her daughter grew up to be wonderful and got married, living together with Nanae. One day, an event occurred in their otherwise ordinary but happy life. She accidentally witnessed her daughter's and son-in-law's nighttime activities and was shocked. The mild-mannered and serious son-in-law was thrusting wildly like a beast, making her daughter climax repeatedly. Seeing this, memories of 【SEX addiction and insemination】 resurfaced, and she could no longer suppress her desires...
