I like boobs as much as the next guy, but other than drawing attention to the boobs, to make an entry for the challenge, I can't see any reason for the shot. The left arm and shoulder is blown out, the crop isn't appealing. It doesn't even work as a "catalog" shot. I don't think you've done justice to the model here. Sorry to be blunt.
B is for a B-cup? Joking aside, this is actually very nicely done. The lighting is great, processing is smooth and tones very good. Well done on what I guess is meant to be a provocative image and title.