Pinkie Pie's hunger for all things genealogy has turned up a bit of an oddity. Perplexed, she sets out to to talk to the only pony who could possibly have the answers: Octavia Melody.
However, there's a reason that Octavia's family history is a big secret. It's a secret that has been guarded and hidden for a long time, and Octavia isn't about to reveal it to the loudest-mouthed pony in Equestria. She'll have to be quick on her hooves to keep Pinkie from finding out the truth but still managing to quench her curiosity.

NOTE: Like the actual episode, you will NOT be told for certain what the secret is. There are hints however.
Written for Equestria Daily's Writer's Training Ground #003

EDIT: Sequel story is now being written over here