Mari's crotch ached with intense gasping voices heard every night, passionate and beast-like copulation where meat collided. Her father-in-law is old, but he's a sexist, and he hugs her mother-in-law every night. He is an active viper human for the rest of his life. Compared to that, her husband is a light SEX. The heart of a frustrated married woman gradually shifts to her father-in-law. She wants to be held by her stepfather so hard like that. Unable to suppress her desire, Mari goes to her father-in-law on a dangerous day.
