She's saying the same thing I was.
She looks like she's modeling for a dirty picture to send to someone via picture message.
Maybe you see it as a dirty picture because you have a dirty mind.
I wouldn't call it "dirty", I'd call it "suggestive". But more to the point of this thread:
1. Can she make it as a model? Anybody can make it as a model if they apply themselves and takes is seriously. Posting here isn't going to give you (or her) any insight or definitive answer.
2. There are much better places for her to go (modelmayem is one) rather than one tailored to photographers
3. Would I shoot her? Sure. But I think people can be sexy and beautiful in all shapes and sizes, so the fact that she's skinny and fit doesn't really matter to me