The colours remind me of those blow-up sex dolls - low contrast in the skin because the doll is transluscent, ridiculously pink nipples xP Slightly higher contrast would help, and the nipples could easily use the skin shadow colours - nipples aren't particularly pink.
The hip/waist area is very smooth. The pelvis typically gives that area a more boxy shape.
Unsupported breasts don't point forward, but more to the sides. So, the nearer breast would be pretty much facing the viewer.
Her waist looks too thin. From this angle, even thin waists tend to look a bit thicker. Think of it like viewing a box from an angle - we see two sides, so the entire box looks a bit wider than any one side. Human torsos are similar, more akin to a box than to a cylinder.
Here's an edit:
I tried to shape the chest, waist and hips to be a bit more realistic, and made some small tweaks to the limbs to give them a bit more detail in their shape. In your original they shapes were very straight and low-detail, which looked at odds with the detailed shading.
I also tweaked the colours. More contrast in the skin, less saturation in the hair shadow colours.
