Here goes my nonPro opinion. One, her leg that is bending is in a weird position. Two, maybe let her stomach show instead of her undies. As always, I like your photos!
Your technique is awesome! Her ankle is bent weird, because of the thick heel sandals, next time have her wear stilletos, so she can grip the floor and not bend the ankle so much or even bare foot. Bare foot and jeans with holes go together. Here is a pick of me.
The second picture, the pattern on the dress is not good. Looks like a little girl's dress. Try something more modern. She is a beautiful girl, so get creative
Something about the model's expression makes #1 a miss in my book. (Disclaimer: my book is profane, I don't have a clue.) But the rest are great as usual.