Well she leans forward to the left side of the picture while you see her hips from front so I think her breasts are on their right place. About shading, well I know my shading isn't too great, but I've always used this layer masking technique. At this picture and this one too. I never thought this doesn't fit and all my friends like it too
Myka is my old username, please call me Huuxera! <3