After Nightmare Night, Luna invites Twilight to tea, and they start spending more time together. Princess Celestia teases Luna about it sometimes.

Her beauty, sullied; her wisdom, corrupt; my love for her, violated. But still I answer...

Summoned to the palace in the dead of night, Twilight takes up a burden that even her generous, loving soul may not be able to handle...

Humanized Twilight/Tyrant!Celestia.

When Rarity is given an order for a dress, a series of unfortunate circumstances lead her to request the aid of Twilight Sparkle. When she discovers that Twilight has been studying time spells, she asks if she can help her recover some of her time. Reluctantly, Twilight agrees, but when she is performing her spell, something breaks her concentration causing the spell to become unstable, sending them 15 years into the future. What awaits them in a world where they have been missing for so long? Will they ever get back to their own time? Only time will tell.

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Art by Dreatos
- http://dreatos.deviantart.com/gallery/?offset=24#/d47n304
Seriously, check out his work. He is one of my favorite pony artists.

There's a new pony in Ponyville. She's perfect in every way. She's kind, fast, strong, beautiful, and is loved by virtually every pony she meets. But something seems off to Twilight. Something seems wrong. Very wrong... What horrible secret will she uncover?

Twilight Sparkle and Rainbow Dash take a walk together, and Twilight teaches Dash the 'pairing game'.
It seems to be an innocent game of love, but Twilight has something else up her metaphorical sleeve...

It's almost Mother's Day. Scootaloo comes to Rainbow Dash with a startling question, but then backs off, feeling ashamed she asked it. Rainbow Dash, taken off-guard by the question, starts to question both herself, how she feels about Scootaloo, and about her past...