So what do you do when your spouse is broken up one day and cheerful the next?

I'm thinking that she might be contacting the OM, even though she promised over and over she wouldn't.

Right now, she sounds all teary on the phone, but won't talk about it.

I'm trying to put my anger to one side - try to show her understanding - but this is really touqh right now. Don't know what to do.