Actually, the photographer is mentoring Anna, not just on photography, but also the processing of the pictures themselves... that's why he spends so much time there... if you look closely, you can see he's showing her about which poses work, when they work, etc... also, one of the applications they use is Lightroom, by Adobe... source: Me, I use it for my photo processing...
edit: And also to take pictures of them, thought that was obvious, but I didn't want to leave anything out...