Hazura Oujo desu ga, Konse wa Taikou Denka ni Aisareteimasu

Poisoned and tortured by her husband, then betrayed by her own family, Saphielle died realizing that no one had ever truly loved her. But death wasn't the end. Saphielle has now been taken back to the day everything started. This time, she won't be playing a fair game. While pretending to be the same naive girl, she will always be ten steps ahead. While exposing her backstabbing enemies and dodging her past husband Felix's lies, she discovers that the dangerous Grand Duke Leander might be her only salvation—and perhaps something more. (Source: Tappytoon)