While in Trotsylvania, a mare by the name of "Fluttershy" meets a gentlecolt named "Dr. Van Helstallion" and must be protected from a vampiric demon who is, not only, persuing her, but killing other young mares in the village.
Years after the King of Shadows attempt at return, Twilight has put her life back together; Her new rule going much more smoothly and with no threat to peace, It was perfect. Thanking Celestia every day her child is not affected by his father.