Lovely crop. I don't agree that the shadow from her neck is a distraction. It matches the shadow from her breast so it's not a major issue for me. I would take some of the green tone out of her arm and armpit though. I know it's natural but it looks a little odd to me. Damn that looks cold - brrr Beautiful shot
Nice composition and it is interesting to see the details of her skin particularly the goosebumps. Also more on the composition it does leave you wondering who the person since that you don't see their face. The only thing I could offer as critique goes is the redness of the neck could have been toned down a bit. Nevertheless I don't really feel that I know what I am talking about. Just my thoughts.
Overall, I think it is a nice sensual piece of work.
I really think it is up to you whether you want to do post-processing on your shots. Sometimes it feels necessary to do some and other times it can be overdone. I fully respect when people leave as it is and it all goes with the comfort zone. As long you are happy with the results, just leave as it is. Cheers