Emily's new favorite word

Since Emily has spent a lot of time with Jack and Mia during the last two weeks (2 weeks of spring break for them) "Mia" has become Emily's favorite word. As soon as she wakes up she calls for Mia. She did start calling for me last week and then I was replaced with Mia as soon as she learned it. She started out saying "mmmina", then it became "mina", and then by the next day it was a clear "Mia". She can also say "jack" but she doesn't quite get the final "k" sound. She goes throughout the whole day saying"Mia", and we say "no Mia isn't here". Then she will say "Jack", and we say "no, Jack is not here". Then finally she will call "mommy" and "yes, mommy is here". Always in taht order. When she falls asleep she calls for Mia, when someone walks in the door... it is non stop. It is hard wanting her to stop and be quiet when we would give anything to hear Stephanie talk but it seriously all day long. Now she won't go to work with me until later in the week if at all so it will be awhile before she sees her Mia. She will also only say it when she wants because if Mia shows up and says "say Mia", Emily will say "dada". That little stinker.