Libby and Avery were having a conversation that was making absolutely no sense whatsoever about dogs. Libby totally misinterprets what Avery says (understandable) and it's hilarious.
Libby starts crying, "Avery says that she wants scary dogs to come on Halloween and they're going to eat me...but I don't want them to...'cause I'm too beautiful."
Earlier today in the car Libby says, "I want to drive a minivan...when I grow up...when I'm a teenager...when I turn 5."
I don't know why she pauses between what she says, but it adds to how funny it is.