Gorgeous girl and nice shots! They look a little soft but I am guessing that its the resizing not the actual shots...
I think it would be great to see some shadows and depth to the scene as opposed to one-dimensional lighting. Also, it looks like the model has somewhat protruding front teeth (number three doesn't work at all for me; she looks uncomfortable and unnatural), so it appears that the best shots may be with her mouth closed or barely opened. It would be interesting to see her when she's not looking directly in the camera, which is a hard pose to carry successfully (I've been on both sides of the lens). You might try engaging her in a simple activity -- writing something on paper, getting ready to drink (but not really drinking), pencil in hand, maybe an old camera body in her hand -- for a warm, natural look that can also be sexy. My impression is that this model doesn't have any (or much) experience, and it really can take awhile to warm up to a camera.
