Nate question

I had the impression that Nate had never met Madea or Ella. However, he calls Ella "Miss Ella" in the first scene in which he stops by the pick up Sonny.

Is this a goof or are these characters already introduced at some point prior to our seeing him at Madea's house for the first time?

Get busy living, or get busy dying. Andy (The Shawshank Redemption)