The lighting is nice, sculpting her features well. Her hair also looks great, which is something I wish more photographers would pay attention to; for a planned photo shoot, it's worth it to make sure the model has her hair looking it's best otherwise it can ruin the entire look. Healthy looking hair ALWAYS makes a portrait look better.
I think her skin tone could be a bit richer in the first shot. Also, in the first and the third shot I feel like the leg positioning is a bit awkward. In the first shot you only see a glimpse of one le, and I feel like you could have used her legs to create more harmonizing lines for the overall image composition. In the third shot I think it looks kind of weird to just have her foot poking out, and again I think was a missed opportunity to use her legs to create some shapes and lines for the image composition. Similarly, the hand that's reaching around the branch in the last shot kind of looks awkward, as if it were a dismembered hand.
Another thing I notice about her leg in the first shot is it's purple tone, causing it to look dead. I would use a layer mask on a "color balance" adjustment layer in photoshop to isolate the area and match the skin tone with the warm tone of the rest of her body.
The processing on the third photo is interesting and I think it's headed in the right direction, however I think you could do some editing to add warmer tones to her skin, which in turn would have a nice harmonizing contrast with the overall green tones you added.
