Oh wow. What a crock!
Had a similar experience once: had one of those informal meetings in early Spring for a New Year's eve wedding. Never heard from them, so naturally I took them out of my file.
Just before Christmas I get a call from this Bride to confirm the order and delivery time....
what? Um....I don't think so honey! She was upset, but understood-apparently she thought he mom was taking care of ordering the cake.
Anywho- turns out no other bakery would take her order (duh.) So being the schmuck that I am, I finally agreed to do the cake for her. ugh.
So I hope the conversation goes ok with the MOB. Good luck! Sorry this had to happen to you. Hang in there!