I know this is hard. Try to take some deep breaths.
On Saturday, you will listen. Validate (but don't agree).
You will state your position, which is "The only two things to discuss are our marriage, or the end of it. The second one is a legal matter, and better left for attorneys. And as far as our marriage goes, I told you, I won't discuss it so long as you've invited a third person into it. End your affair, and we can talk."
