Nice photography, nice lighting (although it seems to have made the background a bit 'flat', almost looks like a backdrop in a few of them), nice compositions and locations..
I think the model is a good looking girl but she needs more experience in front of the camera to feel more comfortable, the poses look a bit 'forced' to me.
I think if you can manage a few more sessions with her you will definitely see an improvement.
You're coming up with some good studio work and you have had some beautiful girls to work with (which certainly makes it easy to look at your photographs but, not always easy to critique, too much of a distraction).
Gary