Stepmother turned into a sex slave to his son

Despite the opposition from those around him, his wife Sayuri married Hiroki, who is older than him. Hiroshi, who is his son-in-law, cannot forget his dead mother and is unable to acknowledge Sayuri as his mother. Hiroshi begins harassing him in an attempt to somehow drive Sayuri out of the house. Sayuri, who believes that she will definitely become friends with a certain period of rebellion, is a type of rebellion, but instead of getting angry, she tries to accept everything...