Same location and same time.. but not the same meeting.. so I'm not sure what problem your A could have with you attending the Al-anon meeting which would be more convenient for you (?).
Flip it around.. if you had been going to that meeting and your A decided to go to the AA meeting at the same location and time.. would you place any obstacles in his way?
Sounds like you have already made compromises about this.. when do they stop.. when does your recovery become equally as important?
Tx