A great picture, with nice shading and composure. Sensuality is described through a very decent execution of her curves, both the body and the pose. Sensuality is all that this picture is about, so my recommendations are:
- Include a background which is not cold. The red dress and deep shadows give the girl a very erotic, mysterious image. Such a bright, white, monochrome and pure background makes a negative contrast on the overall effect. It should be something darker, something hot and dim maybe.
- Her hair. There are a couple of issues there in my opinion; first of all, since the woman is apparently undressing, she has to transmit this in every aspect of her figure. Her hair being tied does not help much, it gives a note of restraint to a message of liberation. I'd suggest her hair adopt a more loose, lively and free form. Moreover, the drawing style does not match completely with the rest of the body, the outlines are clearer, less blended than the skin or the dress, so perhaps you should keep an eye on that?
Hope you found these hints useful!