For the last 2 years, my wife has accused me of cheating on her with a woman she knows at work. The accusations are constant and ugly. She's wrong about it: I've never been with the woman she accuses me of sleeping with. The problem is that I have been having an affair with an older woman who was the matron of honor in our wedding. Keri and I have been involved since before my wife and I got married, almost from the very first day my wife introduced me to her. Keri has been married the entire time, but that never stopped us from being together. I would have married Keri instead, but she wouldn't leave her husband because they have kids together. So, I deny my wife's accusations because I know they aren't true, but I'm never as forceful in my denials as I would be because she is right about my having affair, just not who it's with. It's an awkward place to be, but I can't help it. The only thing I could do is break it off with Keri. I've tried that, but we keep coming back together. She's too good to end it.