If you don't have the authority to dismiss her, and your pastor is not willing to do so, then in my opinion, just leave her alone and wash your hands of it. You are not going to change someone who has been doing this without change for 40 years and it is not worth the stress.
it creates the potential for an uprising.
She has been running it for 40 years now and has been doing the same nonsense since she started.
To participate in the discussions on Catholic church music, sign in or register as a forum member, The forum is a project of the Church Music Association of America.