If you look at the reference pic (in the text somewhere) it may be a bit clearer. There is actually only one on show, the 'other' is an arm! I think I could have made it all a bit clearer - it does look more realistic in the life size canvas. Thanks for looking in anyway.
The body anatomy seems strange. She looks like both breasts are on the same side, and that upper hand doesn't seem to belong to her body. When I first looked @ this picture, I thought she was clutching her shoulder, not her shoulder blade/back. I think that's b/c the wings are placed closer to her spine than her shoulder blade.