I creampied my wife's mother

Naho's daughter has a husband named Atsushi. Furthermore, her daughter's 5 month old baby was pregnant with a 5 month old child, and for Naho, who lost her husband early, it was a happy life for the family of three. But one day, when Naho gets out of the bath, Atsushi is seen looking for Naho's underwear. Atsushi hurriedly runs away. From that day onwards, the mother, daughter and her husband develop into a slutty love triangle...