Blood Oath Reborn: The Vampire Matriarch's Vengeance

Seraphina was killed in her previous life when her half-sister Isabella pushed her into the Abyssal Rift out of jealousy. After rebirth, the two swapped their marital choices — Isabella snatched the demon Marcus, while Seraphina took the vampire heir Cassius. On the wedding day, Seraphina magnanimously took in Cassius's mistress Margaret and her illegitimate son, earning a reputation for tolerance. She won over her husband on the wedding night, gained the matriarch's trust, and after receiving the bloodstone steward seal, she reorganized the family's shops and blood-crystal mines, rooted out corruption, and had the mistress and her son classified as a branch line, permanently cutting off the illegitimate child's path to inheritance. Isabella indulged in the demon's lust, unaware that demons drain their partners' life essence to cultivate, and her body deteriorated day by day. On her deathbed, she entrusted Seraphina with eliminating the demon. Seraphina gathered evidence of his crimes and allied with both the vampire and demon councils of elders to execute Marcus. The elderly matriarch, on her deathbed, passed the bloodline seal to Seraphina, naming her the new vampire matriarch. Three years later, Seraphina bore a legitimate son, her husband fully reined in his selfishness, and she broke free from a life of dependency, becoming the true ruler of the vampire territory.