While drinking and hanging out, Twilight is flustered by just how open Cadance is about her sex life. Certain unwanted feelings arise between them but, in the heat of the moment, they just kind of let things get out of hand.
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.