An update from the interwebs; it appears that more pictures and a video are posted.  From the general consensus, its looking like its actually Kristen Davis.

The pics are nsfw, and to be honest, pretty dirty.  For some reason the computer isn’t letting me check the video out, which is odd because I watch entirely too much porn without it ever acting up on me.  Let us know what you think.

Kristen Davis - everyone’s favorite prissy stress case from Sex and the City looks like she might have made an actual sex tape. Is it her? Well - it sure as hell looks like her here in this photo.

Granted it might be a doppelgänger but I really don’t think so. Charlotte York would be freaked. Her publicist also added “This is not a photo of Kristin Davis. There is no sex tape.” Isn’t that what all publicists say at first? If you have a link - post it in the comments, I think further review is necessary.