This is a really nice piece
As for the areas of adjustment the topless woman the first things I gravitated to were her nose and chin, in the three-quarter pose you wouldn't see either that much or at all the second nostril.
Also the chin has a very hard line when it should just be some simple shading.
Her exposed cheek could use a little more shadowing just under the high cheek bone
With the woman lying down her human fingers are a bit too muscular and wide, also with the angle the nails should curve outward and not inward.
These however are incredibly tiny marks compared to the whole piece, it really is nice in both its setting, placement, and time of day when it comes to your shading.
I especially love the background work and the tiny flecks of dust being caught by the morning rays.