TwiPie, FlutterDash, RariJack Love Story

Twilight, Fluttershy and Rarity are sisters and daughters of Discord and Princess Celestia. Twilight is the only one that's born as a Alicorn whilst Fluttershy is a Pegasus and Rarity is a Unicorn. Twilight's the oldest, then Rarity and then finally Fluttershy. On their free time from studying on being the next Prince...