lol. When she saw that he joined the institute she demanded that he leave and go back home or else. She only let him live at that time when she thought that he wasn't important. She was also standing right there when her cousin attacked him. Again when he went to become an elite student she let her people attack him and demanded that he go home and live in seclusion if he wants to live in peace. So because she asks him then he should do it? She tricked him and almost got him and his entire family killed off. Pettiness implies that you're acting because of trivial matters. Yang Qi is trying to kill her for legitimate reasons. Thinking they wouldn't move against him if he didn't show hostility is naive. She wouldn't take the risk and wouldn't be satisfied with a potential threat like him unless he submitted to her. If he acted in the same general manner with the exception of never threatening to kill her it would be the same. We already know that she's a lying and scheming person. Why would you take what she says at face value and pretend that she's innocent in all this?