I have 1 BM who has a 2 yr old. I haven't asked ANYTHING of my BM's except going to get measured and order their dresses. I've asked my MOH and my sister if they wanted to come to my first dress fitting but that's the extent of me asking anything from anyone.
I DO though have a BM who tends to have 'emergencies' pop up all the time!!!!! I've known this girl since we were 7 so I just realize it's part of her personality and kind of accept it and knew this was how it was going to be before I asked her.