What Is Going On Here?

This is a picture from a Wired story on John McAfee, wealthy entrepreneur who chucked his life in the US and moved to Belize some years ago. He has been on the lam and just recently returned to the US to avoid extradition back to Belize. Anyway, this is the 67-year-old McAfee with his current girlfriend, the 20-year-old Belizean Samantha Vanegas:

Take a close look at that image. (If clicking on it doesn't work, you can see a very large version here.) Now, I know pictures often capture moments in time that aren't necessarily representative of a scene as a whole, but still, I'm curious: what is she doing in this picture?

As a Dom, my default assumption is that in this situation, the man would be the Dom and the girl the sub. But I have no evidence for that other than their respective ages, and her poor background contrasted with his wealth. And even if they are in a Dom/sub relationship, what is she doing? Is she letting him know she wants to suck his cock? Is she begging him to kiss her deeply? Some other sexual signal? Or am I on the wrong track here?