[Exhibitionist] need Ideas to expose wife to friends, without the audience knowing its her

[folkers]

My wife is an exhibitionist and we fantasize about showing her of naked in front of our friends.
But..
We live in a small community and she is well known in our small town and it cant get out that this is some sort of a kink of hers (because of her work).

So we have tough about two ways of doing this:
We some how show pictures of her without the audience knowing its her.
-it would be a bonus if we could be present to see their reactions.
Letting someone see her on accident(knowing its her), but letting that person think we don't know so he keeps it secret.
-the person who sees her can't have a change to take a picture, or save any evidence.

we actually did this successfully once.
I took a Polaroid picture of her in doggy with cum dripping out of her(no face). I rubbed some dirt on it and made it look like it had been outside for a while. Later we had two couples for dinner, and we I brought up a story that I had found I pornographic Polaroid in the mall parking lot, I started describing it and waited until someone asked id I still had it. I acted all unsure and said I was going to check in my car.. Bingo! "i found it guys!" And then they all passed it around and inspected it closely, and talked about the person who lost it, how embarrassed it would be, and that they probably know the person in the picture(small town remember)..

we had the best sex of our life after they were gone,, please give us more ideas to execute something like this again without it being suspicious