Here is how The story begins goes in Stayin' with Celestia.
Princess Celestia: (sighs)
Princess Yuna: Ready for fun, Aunt Celestia?
Princess Yuna: Aunt Celestia? Are you okay?
Princess Celestia: Oh, Sorry, I was just thinking, Yuna, Have I ever told you or Snowdrop about the time when I took care of you when you were a baby filly?
Princess Yuna: Please, tell us!
Snowdrop: We've never heard about it before.
Princess Celestia: Alright, It was a long time ago, Yuna, When you were only a baby filly, Your Parents had to go out on their anniversary date and I took very good care of you.