Doormat Heroine wa Sokkou Shuuryou Itashimasu!

Leda had lived a life of total resignation, enduring the unreasonable cruelty of her family and fiancé. However, the moment her fiancé declared, 'I will never love you,' a flood of memories from her past life rushed back memories of how she once ruthlessly punished a cheating husband! Vowing never to endure in silence again, Leda fires back and completely shuts down her fiancé. Her fiery spirit catches the eye of Duke Gies, a stunningly handsome nobleman who witnessed the scene and suddenly proposes to her on the spot?! The curtain rises on a reincarnated lady’s grand comeback, as she seizes happiness for herself and everyone around her.
https://www.cmoa.jp/title/355567/