I don't get why he doesn't encourage you to go to that meeting if he wants a relationship with you in the future. Are you planning on divorcing?
If he wants a relationship, you could go for coffee afterward each week.
If he or you wants divorce, then who cares what he wants, he doesn't deserve to make such demands.
It isn't even a complaint that makes any sense whatsoever. (unless of course, he's working on some girl from AA and doesn't want you to know or see them outside having a cigarette together).
It's not like you would be in the same room with him, so why does he care?