Two of the best "truth darts" that were given to me were "This is your mess; you need to clean it up" and "I'm no longer willing to lie to cover up your affair." (I've since revised the second one slightly, using Gucci's "I have decided" preface, thus, "I have decided that I'm no longer willing to lie to cover up your affair."
One of the only "easy" things about this very difficult time you're going thru, is that his behavior is actually going to be very predictable. Between how well YOU know him, and how well WE know affairs and wayward behavior, we can anticipate 90% of what's going to come up, and therefore you can think ahead of time what you want to say and do.
