I've been with my GF for over 10 years. We live together and pretty much do everything together. Lately, I've noticed she'll ask me to go to the store to pick up some random thing for her. I found this sort of weird because usually we would just go to the store together. I became so suspicious that I would leave my iPad voice memo app recording in the room while I was gone. The first time I caught her talking to another guy, it was hard to hear the context of the conversation because she had the tv volume up pretty loud. But I could hear her laughing and the tone of her voice was very flirtatious. I didn't want to confront her without really knowing the substance of the conversation. The next few times I recorded her it was almost the same thing. Loud tv volume, laughing, and flirting. I was able to start piecing words together and found their conversations being very sexual. I decided to finally confront her about it. When I did, her first reaction wasn't to deny or apologize for her actions. Instead, she got mad at me for recording her without her consent. She broke down crying about past experiences being recorded without her consent. Now I feel bad. But clearly she's cheating, right?