What was that? Nothing?

Looks good! I especially like her expression, which neatly sums up the mood of the whole scene.

Another virtue is the use of depth of field, and the contrast of sinister blue light vs. the warm indoor light.

I do have mixed feelings about that blue light, though. It's not a lack of realism - even if it were a cheat, it's "realistic" if it enhances the impression of reality, whether or not it follows some set of rules. But it seems somehow unmotivated: what is it? We don't need to know, but we would like to have some basis for speculation. It also confuses things a little; is the woman merely suspicious, or is she seeing something with a blue glow and is actively scared?

One other small thing: I would suggest some postwork on her shoulder, to eliminate the bits of skin and the irregular hem. Texture mapping is hard! Her neckline is completely successful, IMO.

Overall, it's dramatic and highly effective. Good work!