A/N: I do not own MLP; that belongs to Hasbro. I only own my alicorn OCs and my storyline. I hope you enjoy! Also, this was originally published on Quotev, and then DeviantArt.
Twilight Sparkle was out walking with Rarity, discussing books. Suddenly, a young alicorn mare ran out of the bushes on one side of the path. She had a white coat not unlike Rarity's. Her mane was purple, indigo, and a color of blue a few shades lighter than navy. Her eyes were purple, like Twilight's.
Right behind her was another alicorn mare who looked to be a couple months younger than the first. Her coat was a shade of lavender that looked to be the same as Twilight's own coat. Her wingtips alternated white and purple. Her mane was a purplish-indigo with the occasional white streak. Her eyes were the same color as the first mare's.
"Oh, Twilight, Rarity, I'm so glad we found you," said the first mare. "It was crazy-"
"I'm sorry, do I know you?" asked Twilight, confused.
"Uh, yeah," said the second mare. "We're your daughters, Twilight Snow and Starry Pearl?"
"Hold on a minute - daughters?! I don't have any daughters - who's your father?" spluttered Twilight, confused.
"We don't have a father, remember? Rarity's our second parent," said the lavender one, presumably Starry Pearl, pointing at the latter.
"Wh-WHAT?!" said Rarity, stumbling back. "I don't - I'd never - What are you implying?!"
"Ohhhhh," said the white mare, who must've been Twilight Snow. "Starry, we must've traveled back in time!"
"That would make sense," said Starry. "Sorry, gotta go!"
The two mares launched themselves into the air.
"What was that?!" said Rarity, breathing hard.
"I have no idea," said Twilight, just as befuddled as the former.
Neither mare spoke again for a while. Finally, Rarity whispered,
"Is that biologically possible?"
"I believe so," said Twilight. "There's probably a spell for it somewhere."
"But... do you think we would do it?" For this, Twilight didn't have an answer. They finished their walk in silence.