It was a novel about a tyrant. It was about the female protagonist's adoptive father gambling and owing a debt, and the female protagonist sold herself to pay off the debt! I remember it was 30 million

It was a novel about a tyrant. It was about the female protagonist's adoptive father gambling and owing a debt, and the female protagonist sold herself to pay off the debt! I remember that the female protagonist had an older sister who was originally in a relationship with the male protagonist. Because the male protagonist hid his identity and hooked up with the male protagonist's brother, he stole something from the male protagonist's house before they got married and died in a car accident. The male protagonist began to take revenge on the female protagonist and even made the female protagonist wear a dress to her sister's funeral. The male protagonist's first love seemed to be a scheming bitch who married the male protagonist's father! The male protagonist took the female protagonist to a house on an island and made her a maid and tortured her.