Nice set (well, these four anyway, shouldn't check out the full set from work). Thanks for sharing.
Not sure if you're looking for C&C, so feel free to disregard the following comments.
Shot 1) Question - when you shoot smoke (I never have) do you shoot in burst mode or single shot? There's a lot I like about this shot (her expression, the processing), it's just unfortunate that the wisp of smoke drifted up right across her eye.
Shot 2) I like this one as well - I like that in a shot largely comprised of a practically naked woman's tush my eye is drawn to the shapely pose of her hand and the lit cigarette. My nitpicks on this one are that I wish her underwear had been evened out (the engineer in me likes symmetry in details like that) and it looks like the background (as defined by the window frame) wants to be rotated CCW a smidge. Her lines look pretty darn vertical to me though, so I suspect rotating the frame to get the window level might actually detract from the result. I go back and forth on whether I like the bit of bookcase on the right, whether I'd like it better with that dark area defining the right border of the frame or if I'd like it open ended, cropping to leave the light gray trailing off the right.
Shot 3) Very nice use of lighting and depth of focus to show her lower body without having her ink draw attention away from her face. It's also a great pose for an implied shot, it shows without showing too much in a manner which looks completely natural for the setting. I do wish you had been able to avoid the spout in the bottom right corner (that's probably a bit difficult to clone out with her ink right behind it, eh?). Again, I like the pose and the composition overall, and I'm not sure how better to do it while keeping the natural feel, but I wish her right arm hadn't been disconnected (and that the tip of the cigar had been seen - tells so much more of a story IMO if it's lit).
Shot 4) Nothing wrong with it, per se, it just doesn't move me as much as the other three do.
Again, nice job and thanks for sharing!