It was very late at night, but two certain princesses were awake past their bedtime, they had decided to read the book that Spectra had found on their mother’s library in the castle.
 
“I can’t believe you got it!” said little Astral leaping at her sister’s side on the bed, Spectra made a little gesture with her wing to tell her to keep quiet “Shh! don’t be so loud! remember that our moms don’t know about this!” “Oh yeah, sorry! but i’m so excited!” “Me too! Mother showed me that this was her favourite book as a filly, i wonder why she never showed it to us” “Well, we will have to read to find out!” Astral’s horn started to glow with a light spell, and her sister started to turn the pages and read.
 
“Once upon a time, in the magical land of Equestria, there were to regal sisters who ruled together and created harmony for all the land” “Two sisters! Like you and me! what a pity that i’m not an alicorn like the other one…” Astral said, Spectra wrapped a wing over her sister “Alicorn or not, you are my little sister! let’s continue: To do this, the elder used her unicorn powers to raise the sun at dawn, the younger brought out the moon to begin the night, thus, the two sisters maintain balance for their kingdoms and their subjects, all the different types of ponies”
 
They continued reading, enjoying the story, until they reached one part “…but the bitterness in the young one’s heart, had transformed into a wicked mare of darkness-” In that moment they noticed the room light up, and took their eyes off the book and saw their mother,Twilight, standing in the bedroom’s door “Why are you two silly fillies awake?” she walked up to her daughters “N-nothing” they said at unison, trying to cover the book with their hoofs “Staying up late reading huh? Just like your mom, tell me, what book was so intriguing that kept you two awake?” Spectra looked sheepishly at her mother “You won’t get mad?” “Why should i?” Spectra raised the book in her hoofs, Twilight immediately recognized it “You said it was your favourite…and we were curious, so i took it, i’m sorry…” Twilight looked a bit shaken, but gave her daughters a little smile and joined them in the bed “Well, i never told any of you not to take it, it is a very special book for me” she brushed the cover slightly with her hoof “I met the two princesses myself” The little fillies raised their head at this, with stars in their eyes “Really?!” “How were they?!” Twilight told them everything about the princesses, how one of them was their mentor, how one of them was trapped in the moon by the other…she couldn’t tell them about the truth of Nightmare Moon, so she told them the princesses had disappeared long ago. “Mommy?” said Astral “Yes dear?” “What happened with the sun? it said in the story there was one” “I…i will tell both of you when you get older, now you two need to sleep, or you will get grumpy while you do your duties” She tucked them in bed, and went out of the bedroom with the book.
 
“Spectra? Are you awake? “Yes, what is it?” “Would you ever send me to the moon? If i was bad? like, ate your candies or something?” “Of course not, even if you ate my candy, i would miss you so much, would you send me there if i did something bad?” “Nuh-uh, never! We are together, always” “yes,always together” and the two princesses fell into a deep sleep.
 
Two sisters started it, two sisters will end it, the prophecy of the Bad End AU (But don’t make any assumptions tho ;D)