I understand in that scene that she realized she hurt him immediately. And perhaps on the surface she really didn't care what he did. And yet there was still that thought in her mind. The words didn't come out of thin air. On some level she had to be thinking it or feeling it for her to say those words. She hadn't totally changed her picture. And the fact is that she still said the words. So even though Wade forgave her and it got the ball rolling, it still reinforced the idea to him that he had to live up to this image that he thinks she had of him.