The sheets look a bit bright, I like how even the tones of her skin are though. The shadows aren't too dark and the highlights aren't washed out. I think it would have been nice to see her other arm extended, maybe bent at the elbow with her forearm skyward.
It's nice to see a photo of an aesthetically pleasing woman that accomplishes that without using gaudy emphasis on her genitals. Her pose really helps to give the illusion of a more rotund posterior. Booty tooching, I think it's called.