Erotic novel Married Housekeeper ~Please take a peek~ Otsuki Hibiki

Otsuki Hibiki appears in the erotic novel series! ! This time we'll be introducing the popular series "Married Housekeeper"! Hibiki takes care of his grandfather from the client's father. As the client's son sees his grandfather caring for him, he begins to notice Hibiki as a sexual object. One day, he witnesses Hibiki providing sexual care to his grandfather, and he is unable to control his desire to have sex with the housekeeper. What did my grandfather do when he saw his grandson like that? ?