Help! How Bad Is It to Dress up as the Heroine's Vicious Mother-In-Law?

Before going to bed, her best friend sent Qin Ru an outline, which she criticized as useless. Qin Ru believes that the heroine should have the most tragic life experience, the most difficult fate, and finally counterattack and become the best in the world. Such a story is satisfying. Then, when she woke up, she became a stumbling block for the heroine - her mother, who was not very clear-headed, was holding a stick in her hand and was about to beat her poor daughter...