Her IC sounds toxic for your marriage. if your wife keeps seeing her, she will be more pressured to "do what makes her happy", which in the therapist's mind, will be to divorce you and go date lots of people.
There are unfortunately lots of "therapists" like this out there, making their money from telling people "do what makes you happy", rather then give their patients actual therapy to help them better deal with challenges, and grow as a person.
If you have any way of convincing her to change therapists, to one who is actually marriage friendly, that would be a Very Good Idea. Definately not work trying to "force" her to. but if the discussion ever comes up... i'd suggest leaning towards "change"!!
But, if retrouville is soon... probably best not to stir anything up until after that
My current status: june 2006. Wife ran out and filed D. Finalized Jan 11, 2010, after 12.5 years M. 3 wonderful sons caught in the middle