Reborn as the Heroine's Cannon-Fodder Half-Sister

[System + transmigrate into a book + food] Shen Tang transmigrated into a book, becoming the legitimate elder sister of the heroine, Shen Youyou, who shared the same father but had a different mother. She was also destined to be a sacrificial pawn on the heroine’s path to becoming empress. In the story, Shen Tang’s father didn’t love her, and her mother didn’t care for her. Her birth mother was driven out by the household concubines and sent to a nunnery, while Shen Tang was sent to a country estate as a child and grew up there, forgotten by everyone until she was fifteen. By sheer coincidence, she saved the male lead’s life and became the woman he could never forget. The heroine grew jealous of her and sent her to her death with a cup of poisoned wine. Shen Tang arrived in the original owner’s body before she saved the male lead, and vowed never to get involved with the hero and heroine. She was bound to a System with a food marketplace. After learning that points could be exchanged for houses in the real world, she decided to dedicate herself to saving up points! Who could have guessed that before long, the emperor would grant her a marriage, and her intended would be a foolish prince... Although Shen Tang knew he was only pretending, a man who pretended to be stupid was harder to handle than a genuinely foolish one! Every day, she researched delicious foods and sparred wits with the scheming prince. It was exhausting! Still, as she opened restaurants and took on apprentices, she found more and more ways to earn points. Huh, somehow, the sacrificial supporting character’s fate seemed to have changed.