She did it while I slept. Left the screen rotation lock on and I found it the next day. I asked her if she did and she denied it and then acted really guilty. I left her in the bedroom and came back later and showed her the clue she left and she admitted to it. Cried and accepted that it was wrong.

What would you guys do? She found an old fling in my fb messages that I had told her about when we started dating. She was always insecure and has been cheated on in the past. I always trusted her until now. How should I proceed?

Edit: have not been cheating or anything sketchy.