The Toxic Empress Dowager: Your Highness, Please Take a Seat

Her birth mother was murdered, and her own son died a brutal death. She spent eleven years battling for power, giving her whole heart to it, only to be branded a threat to the realm, see her entire family slaughtered, and suffer a death of torture. Reborn, she swore to grind those who had humiliated her to dust and make them pay for their crimes in blood.