OK, get her a copy of Not Just Friends and make sure she reads it... They MUST know that comparing an affair and a marriage is NOT constructive... MANY therapists compare the two as the same thing... which is exactly what your HUSBAND is doing...

Early on your therapist and your husband need to know that affairs are NOT solutions.

It sounds like you have never sat with this therapist yoruself? If you have NOT met this therapist yourself, don't send your husband to them... always meet iwth them for at LEAST one session so you can size them up!