Birth partners

My Mother and Mother-In-Law have both expressed a rather firm interest in being at the birth. 
I'm not totally against it, but would feel better about it if I gave them an actual job to do. 
They are both lovely, and have the kindest hearts but I have a feeling they will be full on excited energy and constantly asking me what I need when I'm hoping to have the room as quiet and relaxed as possible. 
Have you given your birth partners a job? Any other advice?
Thanks in advance.