Looks nice the only disturbing point the breast shading/highlighting.
First the basic color of the breasts is different darker from the face. Usually the face should have a darker one, but about that can be discussed a longer time.
The part that is most of the breasts look like oiled or wet i dont think you would get such reflections from human skin
Also dont have a tablet , i admire ppl who paint with mouse.
I used to color/paint a bit with the mouse but then i gave up on that due to several reason.
One of those was the strain to the wrist. Other i didnt want to sit in front of the computer when i can have it done traditionally in the same time or even faster.
Imagine that xD