User blog comment:Nan the cowdog/Nan's Art for February 2012/@comment-3006892-20120225212738/@comment-3006892-20120225223638

AppleJack: "Now how in thunderation is one of them twins a Pegasus, and the other one a unicorn?

Carrot Cake (The twin's dad): Easy! My great-great-great-great grandfather was a unicorn! And Cup Cake's (The twin's mom) great aunt's second cousin twice removed was a pegasus. (Slight pause. Carrot Cake shifts his eyes nervously) Uh, that makes sense, right?

I did not make that up. That is how the scene actually went.