That's really beautifull, although you why the fake boobs? No women sports such slim body and rocks such boobs unless they are fake. I know you'r going for the "obscure yet sensuous" thing yet i'm positive this painting would rock even more if the breasts were as slimed down just as the body. It would be more grotesque, yet carry with it a genuine beauty. Sorry if i seem to over-criticise, i really do like your work alot.
I haven't seen your wife no, and on further thought although my comment about the anatomical proportions of a womans body may hold true for alot of women, it certainly doesn't hold true for them all. Suppose that it would just simply look better, in my mind, if you hadn't gone for the sexy thing at all, and made her thin as a whole, imperfect, frail and gaunt. It would be less sexy and more beautifull, in an abstract way. Anyways, just a mere observation i still love how you've done it.