In a novel, the male lead was a doctor, and then he cheated on her, and then he divorced her. They had a daughter, and then the male lead couldn't stand the mistress anymore.
This novel might be Poisonous Doctors. Here are some of my conclusions about the novel: The male lead was a doctor. He used to live a happy life, but gradually, he cheated and divorced, leaving his wife and daughter. He met a young girl and they gradually developed a relationship, but the girl's identity made him feel confused and uneasy. As time passed, the male protagonist became more and more unable to tolerate the girl's hypocrisy and selfishness. Finally, he decided to divorce and break up with the girl. However, his departure did not make the girl feel guilty. Instead, it made her more determined in her feelings. She began to pursue the male lead and tried to destroy the male lead's marriage. In the novel, the male protagonist's daughter also experienced some unfortunate things. Her mother was hurt by a mistress and went through a series of psychological treatments. At the end of the novel, the male protagonist found his wife and daughter again, but he had become stronger and more mature. He had learned how to take better care of and protect them.