There is a really good shot to be had here but I don't think you've optimised your viewpoint. I really like the blur you've created in the hair and face but the view out of the window distracts.
Nice lighting on her legs and arms, nothing distracting out of the window either, I like the material drape too as it's more interesting than a dark shadow there. Part of me likes the motion blur of her head as it enhances the idea of anonymity, although part of me wishes she'd been still so we could see the details of her hair too.
I love that your model is fit and has muscle tone and looks like a normal woman, but there is too much uncertainty about her face and hair. Was she not comfortable having her picture taken nude?