This is a great idea and the subjects are wonderful, but I would have cropped a lot of that sky, or composed the shot a little differently. This would be worth another try, Sean.
Super shot! I agree with previous comments, I'd crop out just a tiny bit more of the sky. And, if it's possible to do so without ruining the whole shot, I'd love to see the subjects lightened a bit. They're really dark, and you kind of loose them in the darker part of the background. But, as I said, it IS a super shot, and perfect subject for B&W.
Only wish it had been cropped or shot with a little more of the mother and son.