Bradg, its real smoke. She does'nt smoke, and of course she could'nt inhale it. She took a puff, and filled her mouth with smoke and then simply let it out, and thus it gives a rich and thick effect.
Thank you Chuck. I did nothing much to the background, just desaturated the colors.
Below is another photo, and what I like here is her natural smile. Hope you all agree to that!