Because he gave her what she wanted; he responded rightly to the way she thought things should be. My guess is she got warm fuzzies inside. I know for myself, anyway, that when I get warm fuzzies because of someone I'm more likely than not going to do some version of smothering them with affection - which often can take the form of helpful loyalty (or loyal helpfulness).
I welcome any opinions or ideas or interjections related to the topic at hand.
Yes. Precisely.