Future of the Mane 6 and their Friends Prt 2

The Book

"What ever happened to Astelle, I wonder?" Says Luna to Celestia.
"I know one place to look," says Celestia, "follow me."
Luna agrees and follows Celestia to a hidden library room. There Celestia pulls a book from the shelf labeled Astelle's Starswirl Studies. Celestia turns to the center of the book and finds exactly what she's looking for.
"Here it is," says Celestia. "Astelle after she earned her wings and horn became corrupt and tried to destroy all of Equestria and kill Starswirl. As a result, Celestia had no choice but to banish Astelle to the tapestry. Little did she know, Luna watched it all happen as did Shadow. At that time, Luna had yet to become an Alicorn. That's where it ends."
"Well, at least it's something," replies Luna, "and I wasn't the first sister you banished was I?" She says a bit angrily.
"No, you weren't," replies Celestia. She then goes on to explain and finally Luna understands.