Great pose, good lighting. I personally would fix the wrinkles on the underwear in the back as it interferes slightly with the clean arch shape you were going for; same with the underwear wrinkles in the front that catch the light and seem to be unintentionally highlighted - it was one of the first things I noticed; and the underwear line right above her thigh on her side might look better as a clean line instead of the slightly jagged one it currently is. Also, and I hate to say this, that one line on her thigh, right below the underwear, could be removed as her skin it so light and her clothes so dark that it is also seems to be unintentionally highlighted. These are just my personal opinions. If you meant to highlight these areas, then I apologize.