Absolutely beautiful! Beautifully balanced, love the whites, and I agree with Johnny. She's so pretty. Pretty does help, doesn't it? (And I love the blouse, which I know is not the point. ) You did a great job keeping her pale hair from going dark in the shadowy space. Good work!
I want very much to love the photograph. Try cropping very close to the hairline to get that (to me) jarring window frame growing out of that lovely head.