And never, EVER reveal your source, or allow her to pin you down on what parts you know, what parts you don't know, what you THINK you know, etc. Just a blanket "Stop. We BOTH know you're lying to me right now, and it's incredibly disrespectful. I know all about you and (OM), so please don't insult my intelligence. If you continue to lie to my face about it, I will end the conversation each and every time and we can talk later when you're ready to be truthful with me."
