I Became the Cannon-Fodder Sister of the Female Lead in a Feel-Good Novel

Zhao Ruo transmigrated into a book, becoming a stepping stone on the Mary Sue heroine's path to revenge. Her mother was a domineering legal wife, her older sister a vicious supporting female character, and her husband the crown prince of a fallen kingdom. As for Zhao Ruo, she was a brainless cannon-fodder character with no say in anything. The heroine would trample the whole family into the dirt. Knowing the plot, Zhao Ruo just wanted to change her character every day. But then she discovered that the lecherous, short-lived crown prince had already gone off-script. Crown Prince: Who are you calling lecherous? Zhao Ruo: Whoever lost an empire over a beauty. Crown Prince: My wife ruined me in my last life. This time, I'll save myself first, starting with revenge. Zhao Ruo: Calm down! We're both just minor cannon fodder on the male and female leads' path to domination. Can't we just stop making trouble for each other? Crown Prince: Heh. So, are you going to cheat on me or not? Zhao Ruo: No, no, no! Let's change the plot together. We'll take the male and female leads' path and leave them nowhere to go. Original Heroine: Don't I get a say in this?