Can you post your exif? I think you've done wonderful with the composition. It looks as if you need to work on your white balance. Here's my play at that first picture.
I didn't write down exactly what I did......but short version is: I upped the exposure, tweaked Level and Curves, messed with color balance (though I still dont' think I have it right. I've been staring at the screen too long...LOL), did a little skin smoothing on her, and then sharpened just a bit. It took all of about 3 minutes. So easy fixes with photo editing software (I have photoshop CS4, just in case you need to know). She is beautiful. I can't wait to see more pics from your next session. To me....shooting outdoors is way easier than indoors since you'll be using natural light instead of flash.