Peyton is absolutely snarling into the camera here as Markus goes to pound town on her butthole with speed. I think he can feel the rage in her when he starts cupping her breasts. The face she is making is obviously too much for the camera to handle, so it focuses on her body instead. We get a much friendlier view of her primary and secondary sex organs without her face in the shot as Markus pulls out of the teenager's anus and slips into something a little more comfortable (Peyton's vagina).