Reborn Empress Revenge

In her past life, a woman uses her medical skills to help her husband seize power, only to face massacre of her entire family. Reborn, she uses her five years of memories and medical expertise to protect her brother and grandmother, fight white lotus schemers, and kill the scoundrel. She makes all who harmed her pay with blood. But why has her former husband's brother become attached to her? She promised not to enter his family again, yet fate has other plans.