No really, Princess Celestia has a lot of sex. Really. Cadance's claims to the contrary are unfounded, wholly false, and her concern over the matter is entirely misplaced. There is absolutely no reason to continue discussing the matter.
Months after the end of it all, Spike and Ember have a conversation on a familiar, lonely cliffside. Because even when it's over, the friendships we made along the way will go on. Maybe you'll even recognize the same magic—faded, but still growing.
Long ago, the stars disappeared. Then, somepony returned them. You won't find the tale in history classes or archives—only in the hearts of the mares who were there.
One thousand years is a long time to keep a memory alive, especially one so filled with pain and regret, but some things are worth remembering. After all, somepony has to tell her story.