ORIGINAL POST: My wife and I have been married for a couple years now. I knew that back in college she had one experience with another girl. We'll call this girl Katie. This came after a break up. The two of them had gotten high while watching netflix and one thing led to another. She told me that she really enjoyed the experience, but it had never happened again with her or any other ladies. I do have reason to suspect from our personal sex life that she is still sexually attracted to women.
Recently, my wife visited her hometown to see friends and family. I couldn't go due to work commitments. Over the weekend, she went camping with some old friends. Apparently, Katie was there. My wife claims she didn't know this would happen. Okay, fine. They camp for one night and my wife comes home a few days later. As we talk about the trip, it slips out that my wife wasn't able to find her old camping gear. Okay, so who's tent did she use? It comes out that she ended up sharing a tent with Katie, a one-person tent. She claims nothing happened, but I'm highly skeptical now. The whole thing just reeks to me. I don't really have any evidence at this point, but I'm tempted to go through her phone when I get the chance. How should I proceed?
UPDATE: Ended up talking with one of our mutual friends who went on the trip. She confirmed my suspicions, saying that my wife and Katie were acting weird and even sneaking off together at times. Used this information to confront my wife and she eventually caved and let me see her phone. Went through her texts with Katie to see that they had been texting and flirting for the past few weeks, even sending each other provocative selfies and reminiscing about what happened on the camping trip. I was able to send most of these messages to my computer in case it's needed for the divorce proceedings. I appreciate everyone's time and advice. It's a shitty situation, but I'm glad to be moving forward.