If you do something wrong within the context of how that group operates and someone is nice enough to clue you in about it, how is that possibly rude?
Thank her for caring enough to do that when you next see her.
The purpose of an AA group is for it's members (alcoholics) to carry it's message to the alcoholic who still suffers. You shouldn't interfere with that taking place. If a newcomer walks out without hearing the person who could have reached them, because you participated, then you've caused great harm and huge cost.
Had your husband missed the answer for his problems because a non-alcoholic shared in place of someone who spoke his language, how would your life be affected?