While you're waiting on your card reader, and snooping, and NOT telling your wife what you find or how you find it, you can take time to improve how you relate to her.
I know this will sound like I'm coming down on you, and that's not fair when she's the one acting inappropriately. The thing is, you are here and she is not, so I can only talk to you. So I will.
Now I'm 36, balding, a little overweight and probably look more like 45. She's 34, petite, fit, blond, beautiful and looks more like 24-25.
You need to get into a diet and exercise program NOW. You know your wife finds younger looking, fit men attractive. Can you join a health club and go together? That would be best. Try to find some activity you can both enjoy that will get you in shape. Maybe take up tennis or swimming or plan to complete a race or triathlon next year. Whatever you do, do it with her and make sure you get fit doing it.
She wanted to go. I was not comfortable with it and told her so.
You did the right thing in telling her you were uncomfortable with her plans. Please read up on POJA and learn that you should NEVER agree to something until you are both happy with it.
... I sent her an email asking for answers such as was she hanging out with guys...
Read up on Love Busters (LBs), especially the Disrespectful Judgment. DJs will kill your marriage.
We can't talk about this anymore. She says she feels like she is on trial because I keep asking questions.
You have every right in the world to ask questions until you are satisfied. HOWEVER. For now, shelve the questions and focus on meeting her ENs. There will be plenty of time for questions later, after your snooping reveals whatever it's going to reveal.
Remember, you have a RIGHT to ask questions. The problem is that she won't answer and your questions, right now, will only anger her. So wait until the timing is right and use this time to meet her ENs.
Great job on the camera pic catch.
Keep snooping - you're getting great advice in that regard. And remember to keep your info AND methods to yourself until you've worked with the good folks here to devise a plan. It will be hard but just bite your tongue until you have a PLAN. You need to remain in control. These things always follow the same pattern - it's freaky how similar they are - and when you know what to expect you can be much more effective in how you deal with her.