Thank you everyone for the advice. Our daughter hasn't mentioned it again and is acting completly normal. So I am just going to leave it alone unless she brings it up again. I did make it perfectly clear to hubby that if he wants to continue taking pics he has to be more careful and keep all the pics locked up, he at first said she shouldn't have been in the office to begin with and I pointed out that she was just getting some paper and it could have been anyone (babysitter, my parents, etc.) that found the pics. He agreed and apologized. If she were older I would have had no problem explaining things to her, but she is at a difficult age.
You guys really helped put all this into perspective for me! We are still new to this lifestyle and its great to have a place to get some insight from some wonderful people who have been there and done that. Thanks again!