I think the principal issue is cake eating actually.
There is the idea tossed around that if your WS can have sex with two women, why would he limit himself to one?
But your challenge to this reasoning is a good one.. he won't limit himself, but few OW are satisfied having sex with soemone's WS unless they were told he was NOT sleeping with his wife anymore.. its a spin on the exposure theory.
Rather than exposing teh affair to his family and friends, you expose the husband cheating on his mistress to the mistress... its a bit different, but I agree most OW would not tolerate being lied to.. and yes I would think most men would like and say they aren't having sex with thier wife anymore.
