How Decent Is It to Wear a Book to Save the Villain Tyrant?

After passing through the book, Song Yaoyao found that she had become the tyrant's biological mother who died young, and she was a cannon fodder whose name was not even mentioned in the book. A family of three are either cannon fodder or villains. I understand this sadness! ! ! In order to live a good life, Song Yaoyao was cautious in the palace and planned every step. Her goal is to survive, protect the crown prince, survive the emperor's death, and become the queen mother. However, the enemy's firepower was too fierce. Just when she was about to give up her struggle and accept the fate of being cannon fodder, another time traveler appeared...