My fiance, myself and our son have been asked to be part of our friends' wedding. Me a bridesmaid, fiance a groomsman, and son the ring bearer. We are also supposed to pay for all of our attire. Is there etiquette when it comes to asking more than one person in the family to be in a wedding and be expected to pay all of the costs? Just adding up the expenses (dress, shoes, suit, shoes and a child's suit and shoes --- eeek!).