that supporting my wife a bit in this way could be good for us... "as a couple."
As a couple is what the therpist is attempting to bring togather...you seem to have a deep remorse for what you feel you've put your wife through over this sinkhole religion...I would guess that most of your sessions center on two topics. Your utter distaste for anything wt and your guilt of what it has done to your wife. This therpist is suggesting a middle ground that he feels will lessen the pain for both you and her...
If it were me I would pick the pt and wt study to attend, unless she expects you both to hit the doors after the meeting, to me that would be the easist to stomach...
Afterwards you can skip out for a meal, or whatever you desire, as a couple...this scales back your guilt for the wife, and raises her sense of security.
May, or may not be a good thing...I feel for you, it is a tuff dession to make..even tuffer to follow through...your the only one who knows how far you can go...wish you the best...whatever you decide...