Mouth of Sofia

Sofia and her cousins like to play princesses and fairies. Because Sofia is the youngest, Alex and Eva always make her be the prince while they play the princess and fairy. The other night I was putting Sofia down to sleep:

Me: Sofia, you want me to tell you a story?
Sofia: Yes!
Me: Ok. Once upon a time there was a beautiful princess named Sofia....
Sofia: No, Daddy! No named Sofia. My not a princess.
Me: You're not?
Sofia: No, Daddy. My a prince!
Me: You're a prince?
Sofia: Uh-huh! My a prince. Daddy's a princess!