Footkiller: I'd be interested, but the photos you've posted are way too small for artist references. You need to provide the biggest, clearest, sharpest photos you can - the bigger the better. Make sure the light is good (so the photos aren't "grainy" - and use the flash if you have to) and set your camera for the highest resolution it can do.
Another thing that would be helpful (but not as essential as big clear photos) would be for your wife to pose, barefoot, in a "bound to be tickled" position. No actual bondage is needed. E.g. she might sit with her legs propped up and her arms held as if she were trapped in a set of the Canelli Renfaire stocks.