Reborn as a Cannon-Fodder Woman in Ancient Times

Hu Lingsu woke up one morning to discover she had transmigrated into a book. She had become a throwaway character mentioned only in passing in a romance novel. This minor character was lazy, greedy, and wicked. She refused to work, abused her own children, and secretly sold things from the household... Her misdeeds were too numerous to list. And she met a terrible end. Hu Lingsu panicked. Theme: What do you do when you transmigrate into a book as a throwaway character?