Erotic novel: My son's mature wife Sasakura An

It's been three years since I retired from teaching. His father-in-law Ryutaro lived with his son and his wife and he was having fun every day. One day, on a difficult night, the father-in-law notices the seductive voice of his son's wife hearing from behind the door and peers at the scene of masturbation. Realizing this fact, Anne, who hasn't had sex for more than three years due to her husband's infidelity, she becomes aware of her stepfather as the target of sexual intercourse. What will the relationship be like between the two? Can you beat Anzu's temptation, which gives off a rich, mature sex appeal...?