A very lovely model. I realize it was with window light but the nose shadow comes in at 90 degrees and the shadowed side of the face is too dark, a small reflector at camera would have softened it a bit without spoiling the almost Rembrandt lighting, which works best if the tip of the nose shadow just almost touches the lip at about 45 degrees, that could be done by blocking the light from the lower half of the window allowing only light from the top to illuminate the model. Illumination is one thing, but lighting is what makes the picture come to life. I still do not feel the wrist of a woman should be bent at more than 15 degrees for the most graceful look. Even though you used a square format, that bright area in the trees outside is very distracting, I suggest cropping off the top equal to the left side of the bar in the window. Paul