Wedding time

My best friend is getting married in December and has been explaining to her 5 year old daughter about the wedding. Along with learning what a step-daddy is and what marriage means she has been hearing what the flower girl does.
Well, apparently all A has gotten out of these discussions is that she and mommy will be dressed up like princesses and everyone will ooo and ahhhh over how pretty they are. So she has been inviting everyone from family members to random strangers in the grocery store to "Mine and mommy's wedding after Santa comes."
She also repeatedly asks me "Are you coming when me and mommy get married?"
Her mother told her that they were not the ones getting married, and A said "Oh. Are you coming when me and Z (little brother) get married?"