Rarity hired Twilight on as a work assistant, and with nothing but time and each other, Twilight assumed their summer would be one long sexual fantasy. Twilight quickly realises that her own self-control ends precisely where Rarity's schedule begins.
I write about the countless coital encounters between humanoid horsies, anthropomorphous equines and at least passably bipedal pony people... Also, I really fuckin like Equestria Girls my dudes.