Twilight is in charge of planning a vacation for Shining Armor and Cadence after their wedding. But can she take the pressure...and the jealousy? The longer she tries her very hardest to make this the best vacation she can for her big brother, the harder it is for Twilight to ignore the strange longing she has for him. The feelings she has pushed so deeply down inside of her awaken a new voice in her head that tells her to do awful, unspeakable things to her brother and the pony he loves. And she does them.