Reborn, I Refused to Raise Their Puppet Emperor

In her past life, she devoted everything to raising her husband's adopted son, only to realize the boy was a pawn in a treasonous plot with an imperial consort. Once they seized power, they murdered her in cold blood. Reborn on the day the child first enters her home, she vows never to be their stepping stone again. Armed with dark secrets and ruthless cunning, can she expose their deadly conspiracy to the Empress before they strike, or will history repeat its bloody course?