Somehow I missed this completely. Hopefully the dead silence hasn't scared you off. It's too bad you only have one thing up on your DA, because I rather like it. Flat and black, dark-y ness. The angle of the cloud of smoke she's puffing out is a bit unnatural and stiff. The aesthetics of the cloud look really nice, but the bottom line makes it look too solid, like she's sucking on a piece of cardboard or something. The angle thing also gives it that impression. Something more natural would have been for her to blow it out in front of her to the right. Or if she's just letting it out of her mouth, then you wouldn't need those lines, it would simply rise up out of her mouth.
I like the aesthetics of that cloud, the shadows look organic and nice, so it's odd that the hand is the only place that's completely lighted. It takes it out of the picture. Keep it up!