My Mom, The Secret Matriarch

Ten years ago, Matriarch Vera Grant's eldest son was killed by her ex-husband. Vera killed them, then went to prison for ten years. Released, she found her son, Aiden Grant, abused by his wife. Vera confronted them. Taking back The Pantheon, her subordinates opposed her. She dealt with them. Aiden misunderstood Vera, believing she killed his father. Aiden conspired to poison her. She turned the plot, making him understand. Mother and son resolved their conflict.