I do hope he shows up. I doubt, however, he will. I had read where (and my wife later confirmed this, after she ended her affair) people in adulterous relationships "compartmentalize" their brains, and their values, so "never the two shall meet," so to speak. It's the way they protect themselves.
I think you're wise not to involve casual acquaintances. Even as a "pro-exposure" guy, I only advocate exposing to BEST friends, adult family members, and OM/OW's spouses. So I think your response is a good one. You might want to tell your husband, however, that if you're ever asked a direct question, you will not lie for him.
