The Empress's Concubine Scandal

"Love is like a dog." The moment my beloved husband's sword sliced through my spine, the advice of my sisters flashed through my mind like a series of images. "I curse you. Every moment I loved you is a disgrace to me." The powerful demon who once ruled hell is dead, and now I have awakened as the terminally ill wife of my ex-husband, who has become emperor. [To become a demon again, love a human and stab a dagger into their heart.]