When Twilight heads to Canterlot to get the life story of Celestia and Luna, she had expected to get it from the source. But when Celestia proves she's not a reliable witness to her own life story, somepony- or somedraconequus- may turn out to be just the source Twilight was looking for. Which may not turn out to be such a good thing when Twilight learns some things about her role models that she wasn't mentally prepared to know... Hints of Dislestia, but not enough to be considered shipping.
Chapters (1)
I fail to see why this was downvoted, this is hilarious!
(Insert Rainbow Dash's voice) That. Was. AWE-SOME!!!
5265096
I agree.
5282007
It definitely ranks up there with the more interesting head canons about the Royal Sisters, along with defender2222's own.
5282018
Btw. The most interessting Head-Canon to their family (in my opinion) was one I've read just yesterday.
The story was called: Discord's Family Reunion by Quixotic Enigma
SPOILER
And that, and that's really amazing, despite The Doctor playing a vital role.
5282071 I read prt of that, but I stopped at the part weresummergale talks to the chaos elementals