ok, good call on the therapists.. I would choose A as well, the other two were way too academic and impersonal based on their details.. and I suspect THEY wrote their own.
When you see the word "modality" in a description, they aren't writing for you, they are writing their resume... steer clear!!!
If you can put up a list of everything or some things you think he might say, we can give you scripts of responses, or in some cases we would advise you to say nothing, but we would need an idea of what you are wanting to prepare for him saying.
I read your points above about you feeling you were cold to him during the marriage, and yes once the affair is over that IS something you would have to work on... but while there is a third party acting to break you two APART, that wont' help you right now... he's just going to soak up all the affection he can get from BOTH of you and YOU will end up depressed and anxious...
He DOES need to hear a positive message that you DO want your marriage to be saved and that it CAN be... and that you CAN do the work of being a better person for him... but it CAN'T come from YOU... you can't manage that right now, and HE is just going to argue with you.
If he didn't bring up the text, I would take that as a positive... Did you thank him for going to the IC meeting?
THAT I would do if you have a chance... he will likley say something NEGATIVE about it, do NOT bring it up and force the thank you on him... just wait for it to seem natural. Say thank you, dont' GUSH, just tell him you AND your children appreciate his effort and hope he chooses to continue...
I would just let that pass and tell him you are considering going, as you have some things YOU need to work on... to change for him...