Maybe they're friends, or maybe he just makes people feel at ease.. some people have a natural energy like that about them. Or, if she is a fan, I'm sure she was probably happy to have met him and so she looks that way in the picture.
I agree with Euphoria, it's just the one picture, as opposed to MP with the napkin, frequent pictures, body language in said pictures, other things.. better not jump to conclusions so quickly.
