The chilling image of unavoidable doom, very effective. A lot of good detail in this image. I don't think that the female has to appear more terrified to improve the image. When you're absolutely frozen in fear, there's no specific facial expression to be expected. For some people, they just want the ending to come soon and as painlessly as possible.
Seeing this piece knocked the wind right out of me. Every single aspect of background & foreground are so attentively detailed, and I love the way the werewolves seem to be modeled after the original Howling... expertly done.