A nice image, my suggestion would be either a diffuse light above and to her right (Frame left) or a reflector to even out the exposure of her face a little more. I think as well, a different colour shirt, something a little lighter would help, and lastly, DoF; you've got too much of it. Smooth out the wrinkles in your background, and open your apeture up (or use a telephoto and move further from the subject) so that you don't have the somewhat distracting horizontal lines behind her. Hope that helps.
~John