Show wife's pictures to my friends

Shy at first I slowly got my wife into posing naked letting me take pictures, which now is a large collection, we always talked about letting me show a friend or two her naked photos. Finally she said I could but she didn't want me to say who saw them?
Years later we invited a couple to join our fun, both wives posing naked with both of us guys taking pictures, we recorded all the shoots as well, fun times great fore play