Do you know of a novel where the female protagonist is adopted by the male protagonist's mother?

It was a novel that she had read a long time ago. She couldn't remember the details clearly. It was probably about the female protagonist's mother who loved gambling when she was young. Once, the female protagonist was bullied on the street. The male protagonist's mother saw her and felt sorry for her, so she adopted her. After that, the female protagonist's biological mother kept blackmailing the female protagonist's adoptive mother. Later, the adoptive mother gave the female protagonist's mother a sum of money at once. From then on, the female protagonist cut off her relationship with her biological mother. The female protagonist's adoptive mother had a son, who was the male protagonist. The female protagonist had liked this adopted brother since she was young. She confessed to the male protagonist on his birthday when she was in her teens, but the male protagonist rejected her coldly. The female protagonist was very sad and went abroad to study. When she came back, she became very beautiful. She reunited with the male protagonist at a cocktail party. The male protagonist did not recognize her and almost slept with her. Later, the female protagonist told the male protagonist who she was, and the male protagonist left angrily. Then the female protagonist went to work in the male protagonist's company. She was very attentive to the male protagonist every day, but the male protagonist always ignored her. The female protagonist was heartbroken and decided not to pursue the male protagonist anymore. From then on, she was very cold to the male protagonist. Other than normal greetings, she no longer had any feelings for the male protagonist. The male protagonist felt very upset and realized that he liked the female protagonist very much. He turned around and pursued the female protagonist again. The two of them were together in the end. PS: The male protagonist was always surrounded by a hateful woman who wanted to lose her rich husband. The female lead went abroad and also recognized a very rich godfather.