The kitchen photo with the short skirt and tight top is a forgery — a photoshop, so is the stars and stripes bikini. In both cases Sarah’s head was photoshopped onto photos of other women. I have seen photos purported to be of the daughter that were not the daughter, but another girl of similar appearance.
I have not found anything on the pictures below. The email claims the blonde is Bristol Palin.
This girl doesn't even look like Bristol.