I have dealt with this many times. Patence- is first. Before you present a song (new or already in your library) run it by all your musicains and directors. We call it a musician meet. Drummers are asked to attend to get all special effects on their instruments together.
Once you have all your instruments on one accord your director is right there too being re-freshed. It eliminated many arguements in front of the choir which shows a sign of weakness in the authority foundation. (Any crack in the foundation the building will not be able to stand.)
Your duty is to help; not to cause more problems. Remember, how you treat otheres will someday be how you will be treated. Is she an older person?