The OW lives across the country. I can only do what I can when it comes to getting him to leave her. If I give him the "speech" then he will know where I stand and hopefully in time will stop seeing the OW.
BTW, he has no intention of leaving her. He thinks he loves her and has found his soulmate. I know that the affair has to run it's course. He or she will realize sooner or later that they can't keep it up long distance.
Is it better that I not give the "speech" or any relationship talks at all?