Great job (especially for only your second attempt at selective desat)! I really like the expression and profile lines/curves. The title also lends an air of mystery to the shot.
I disagree with some of the other comments. Not all portraits are about the eyes. This is about the lips. I think that I would crop out the whole left half of the picture and smooth the skin a bit.
The focus should be more on the eyes in this photo. I like the desat and the lighting but it just loses it because of the focus. I also think the crop is wonderful! Well done.
Like the red lips but if the focus was on the eyes I would like the picture mutch more. It would balance the total picture, you would have had two interesting items: the lips and the eyes.