The Villain in the Book Is Brother Zha, and I Dote on the Heroine's Sister Like Crazy

Lin Tianyi passed through the book and became a villain through time travel. The heroine is his sister. He is the adopted son of the Lin family, but the Lin family dotes on his adopted son very much, but does not love their biological daughter. As soon as Lin Tian learned about the plot, he knew that his heroine sister would take revenge after she rose up, so he began to dote on her. As long as I pamper my sister, I won't be killed by my sister! That's right! That's it! If I pamper my sister, I will not be killed by her!