MrBond - thank you very much for pointing that out, actually.
My H also has a hard time understanding the deceit that is felt by his behavior.
Out of curiosity, in your experience, do they ever come to grips that the behavior actually WAS deceitful? I understand one can't control the affair in any way, and this is why one must detach and get a life....but tell me more about the turning point of the WAS, if there is one.