Nice pics and a very beautiful girl, just be aware of your specular high-lights as in pic 2 & 5. Just the tip of her nose is lit up which can be distracting. It's awesome that she doesn't wear make-up and you get a natural look, but due to no foundation you're gonna get some hot-spots as in pic #1. I always bring coffee filters to blot the skin and eliminate hot-spots, great little trick.
Keep up the awesome work!