Not Willing to Be Cannon Fodder Through the Book, I Will Defeat the Protagonists

Shen Qingge travels into a novel called "Conspiracy". The heroine suffers from a heart disease and is her biological sister who has neither a father nor a mother. Her cheap father wants to sacrifice his daughter's heart to the heroine's unrelated daughter. Shen Qingge was angry: Is there such a thing as a daughter-in-law? In order to save herself, she thought she was hugging a golden thigh, the prince Ye Qingchen. Later, she remembered that this unlucky prince was also destined to be cannon fodder. Is it too late for her to abandon the dark side and turn to the bright side? The prince's pair of bright peach blossom eyes looked at her with a lingering attachment like a puppy. She wanted to pamper, spoil, and protect her, and she couldn't bear to let him go. Shen Qingge said righteously: A person must be righteous. Since Ah Chen calls me sister, I should protect him. How can I abandon him? Shu Ling sarcastically said: "You die under peonies, you are a coquettish ghost, your beauty is misleading!" One day, Shen Qingge was carrying a big sword and said with murderous intent, "Achen, sister, help you defeat the protagonist group! Your throne, your country, sister will help you protect it, no one can take it away." Ye Qingchen: ... Thump thump is the sound of heartbeat. Her face turned red, her head lowered, her mouth was frivolous, her eyebrows were smiling, and she said softly: "Okay! I will listen to my sister."