Dear, according to the plot information you provided, I recommend a novel called "The Madam Wants a Divorce Every Day". The main plot is about a female protagonist's fiancé and her half-sister getting together. Therefore, in order to slap her biased father and her white lotus stepmother's scumbag sister, the female protagonist agrees to the mysterious big shot's proposal. This mysterious big shot was the boy whose fiancé had saved her father and helped their family. I hope you like this fairy's recommendation. Muah ~😗