Love the concept and some great shots! I love the choice of clothing as it fits the mood very well and takes away any forced sexiness (no need to flash the flesh for this type of photo).
I guess the only distracting thing for me that stands out is the odd intrusion of a shadow on the pillar to the right. it looks like something is sticking out in from of the light source like a broom or something. Everything else is explained in photo apart from that. Was it intentional?
On a side note your photostream is amazing! Love the landscapes but the portrait work is amazing, if I can take just a few shots like that ever I would be a happy man!