Only Princesses can sing with birds and talk with animals

Mary Poppins comes back to the Banks family earlier than anyone would have expected. But why is that and what does a question that was on Janes mind have to do with it? Will include Mary/Bert later on.

A little note before you start to read this. English isn't my mother tongue and I have no idea how to write a British accent especially not Bert's. This story will also be mostly based on the movie but might contain some references to the musical. Disclaimer: Mary Poppins and all the characters belong to P.L. Travers and Disney.