Nice concept. However, IMO, one should always strive to avoid the "up-the-nose" shot. Foreground is a bit noisy - maye a few more candles (in the fill & main light positions) and/or some bounce cards would help, as would a camera angle more perpendicular to the tub.
This image is supposed to convey the feeling of ultimate relaxation, or that's what I would hope for in a situation like this. However, your model's posture does not seem to be the most comfortable one. The shoulders are a bit too high for comfort. Still, nice topic for the challenge, very tastefully done, with the just right DOF. I'd like to see it with more stooped shoulders (if and when you get a chance). Would make a whole point or two difference. 7.
Great idea, but to my taste would have worked better if cropped just above her breasts. That leaves the focus on her face, glistening skin, and the candles.
The image looks a little washed out. On my monitor, the quantization artifacts make it look like she has some terrible skin condition. Otherwise, might be a good photo.