Kat - I'm glad she was alright. But that is absolutely terrible. She didn't let you know and YOU had her baby? I can't even imagine! And she forgot who had the baby? That is not normal behaviour!
Long before cel,phones - we used landlines. If I was going to be even 10 min late to pick up my child - I let the sitter know.
Sorry to be harsh but that is extremely irresponsible. Young mom or not - she needs to be set straight.
