Divorcee's Hidden Fortune Reveal

On her seventh wedding anniversary, the protagonist is divorced by her husband, who abandons their daughter and brings his mistress to humiliate them. Her husband, believing his mistress is the source of his new - found fortune after a promotion, is unaware that his wife is the daughter of the richest man in the US and that all his resources were provided by her. Now, she's set to expose her true identity and reclaim her dignity.