Reborn as the Stepmother of the Heroine in a Tragic Novel

[The whole story has fallen apart, and I'm revising it very slowly. Don't start reading yet.] Qu Shu stayed up all night reading a novel called Tortured Love: Cold School Hunk, Don't Be Like This. The heroine was the ultimate martyr. At home, her non-blood-related older brother did all sorts of things to her, but for the sake of family harmony, she endured it in silence. At school, her psychologically unstable delinquent desk mate did all sorts of things to her, but she endured it in silence so as not to cause trouble for her family. The cold, aloof school hunk she had a crush on did all sorts of things to her, and she endured it in silence. Her younger cousin did all sorts of things to her, and she endured it in silence. Qu Shu was so furious that she tore up the book. Then, the next day, she transmigrated into the story as the heroine's stepmother. Looking at her stepdaughter's angelic face, Qu Shu decided to take off her qipao, put on a school uniform, and go to school with her! Whenever the male leads tried to do all sorts of things to the heroine, she would roll her wrists. “You want to do all that? Fine, let's do it, you little brats.” The male leads: “...” #The heroine: I thought you were my friends! You actually want to be my stepdad?!# P.S. An old-school, melodramatic Mary Sue power fantasy. P.S. The heroine is ruthless and has plenty to say. Theme: This story is about the heroine teaching others to learn refusal, respect, restraint, trust, and independence.