Would have loved seeing a more clear edge separation between the subject and the white background. Nevertheless this makes a beautiful image. Hope you have other umbrellas since this one seems to be Total loss.
Very well done but a little messy. To me it's a little hard to see what's going on with the umbrella and there is something that just doesn't jive... maybe that it looks like an action shot with a strong gust damaging her umbrella but at the same time her hands and face shows more evidence of a relaxed stroll in the sun. But I do like the concept and the overall look of the image.
I think you went too far with the high key attempted. You lose her entire chin, neck, shoulders, arm, and wrists. Even some ofo the outline of her hand. You could be better served showing the entire broken umbrella as well to give it a little more personality.