Lots of samples of your thoughts being expressed are on this site :
Make sure she owns the divorce 100%. maintain that you don't want a divorce and don't want to break up a home.. its all hers.
Make sure everyone in the room knows she's cheating on you and has been for some time. It's an excellent opportunity for exposure. Do it with maturity, but don't keep her secrets for her either... tell the truth.
No cursing!
make sure your wife's chioces are heard as
a. Repair the marriage b. Destroy the marriage
It's NOT a choice between YOu and OM, its the marriage or a divorce.
