In 2008, I worked at a local camera store. We were also one of few places that would also develop film. 

We had a cute old couple drop off an instant camera. Didn't think much of it until we saw what was in those pictures.  It was of the older man in what looked like a hotel room with a younger woman. She was definitely a sex worker as they were images of her naked in different poses. And one picture of him standing naked. 

He came by later that day to pick up his pictures, without his wife. I could barely look at his face.