Very hot, I could not find anything you did not find.
Kristina from what I can tell only has galleries at those two sites under that name. I would think she's a Russian adult model from the video's. The other female (Dina) and even the male model have a lot of picture and video sets at all the ferrocash sites (old sets) but Kristina was not with them or there from what I can tell under that name.
Someone should be able to come up with another site.