The Second Young Lady's Guide to Taking Down Scumbags

She was a noblewoman from a prestigious family, with gold mines and treasures at her disposal. She followed the Three Obediences and Four Virtues, helped her husband become a great warlord, and supported her father in becoming emperor, before finally stepping aside once her work was done. The emperor treated her half-sister like a beloved daughter, and her heroic husband made that same sister his cherished wife, while she herself was left without even a complete corpse. Only after her soul wandered to another world did she learn the truth: illegitimate daughter = true love = white lotus = heroine; legitimate daughter = domineering = scheming bitch = supporting character? What the hell is that supposed to mean! Reborn with her eyes open, she threw away her virtue, her reputation, and her conscience. She tormented her treacherous sister, stewed her scumbag husband, and steamed her scumbag father alive before carving him up!