If you suspect that your partner is having an affair, number one, confront them. Sneaking around, playing detective is not going to help. One of the first signs that your partner might be cheating is if they hide their cell phone. Confront your partner. Be direct. My intuition is telling me that something's going on. If they deny it, say, I get it. I hear you saying you're not cheating. But my inner voice is telling me that something is not right. I'm wondering if you would feel weird if I asked you if I could see your cell phone. If they deny it, they don't let you see their texts, they don't let you see their voice mail messages, then you might even confront them a little further and say, that makes me even more nervous, the fact that you're hiding your cell phone from me. I'm not asking you to be totally transparent with everything you do. And I respect your privacy, but we need to have a conversation about the difference between privacy and secrecy. Because what's happening now is making me really suspicious.