I used to go to my hometown once or twice a year to visit family and friends.
I would typically stay 10-14 days as time and budget allowed.
Of course, I would always encourage her to have some 'fun' while I was gone. Maybe inviting an old boyfriend over, perhaps a coworker of hers she had an interest in.
Before I left on one of these trips, we were fucking one night, and she announced "I'm going to be so fucking nasty while you are gone!".
Of course, I was intrigued and wanted to know more about what she had in mind.
She said she was going to have this young coworker over and let him take pictures of her pussy. I was a little jealous because she would never pose for me showing her pussy, but I did tell her to make sure she got a copy of them so I could see them when I returned.
To this day, I don't know that she actually did, but if she did, I didn't get any copies.
In any case, I still think it's a helluva idea, and would encourage all wives to do it. It doesn't even have to be anything nasty, but the thought of her being naked and showing her body to another man while being photographed is very stimulating.