I Never Want to Be Your Wife Again

Flora and Edgar, the Duke and Duchess of Cordo, were a deeply in love couple who married after a passionate romance. However, as soon as a Viscountess named Natasha appeared, Edgar took her as his mistress and completely ignored Flora. Flora, constantly harassed by Natasha, tried to retaliate by poisoning her, but was outsmarted and poisoned herself. However, when Flora, who was supposed to be dead, woke up, she was back at her family's Marquisate. It seems she had died and returned to life before she met Edgar. Not wanting to suffer such a fate again, Flora tries to use the lessons learned from her first life to avoid marrying Edgar...?