I think it's uncommonly beautiful. You make good use of Lydia's talents. Her demureness here is enticing.
The colors are gorgeous, not too dry, not too damp. It's the soul of autumn.
The composition is good. One detail that really makes this special is the way both her hair and the ribbon on her garter strap are blowing in the wind. It adds depth to the other visual metaphors, for instance her figure as a tree, or her fingers as branches. The feeling of being in the wind gives a poignancy to the sense of flesh in this photo, a crispness, and also a dynamism. The yearning is palpable.