Li Xue knew that something wrong would be coming her way since she had teased his nerves at the wrong points. Clearly addressing Feng Shufen as her husband when he has just called him the mere title that could change according to his words and wishes.
But was she at fault? No, not even in her most delirious situation. There is no way she was wrong. Her choice of being with Shufen was the best choice of her life. There is no way in which she could leave him. Not even when it was Jing Wei Jin saying her so.