I'm A Bitchy Supporting Actress

A fire had transported her to a novel of the apocalypse, and she had transmigrated into a wicked match.
In order to change her fate, she decided to design the male lead. Originally, she wanted to become pregnant with Steamed Bun in place of the female lead, but who told her why the man she slept with had changed? Who is this man? Qin Xiaoyue didn't dare to face the reality and escaped.
It was fortunate that she was prepared to lead her family and the little bun in her stomach to challenge the apocalypse. The main reason why she designed the male lead was just to stop the killing of the male lead, so if she failed now, would she be able to escape the curse in the book?