I think both pix suffer from TMFF (too much fill flash). Take a look at the work of JT Smith for inspirational images using just sunlight (Rick Hughes, too!). I think you could have accomplished something more natural and soft with a reflective surface instead of flash.
That said, of course, if you do choose to use flash, I'd turn it down a bit. In the top image, even though it is clear that the sunlight is behind and above your model, the foreground flowers are brighter than the background, and there is that tell-tale shadow on her right shoulder, too.
The second image looks like she has allergies or a bad cold. Her eyes are red and she's clinching her teeth.
Pretty girl, though -- I think you have a lot of good shots still left in her!