Details I can remember:
There was a lot of wonderful food description in it; in one scene Puck made himself breakfast (which was about three paragraphs just describing the food) in Kurt's kitchen with no shirt on. Kurt walks in, and then his fiance.
Kurt and the fiance haven't had sex, which Puck said was just cruel to the fiance as they shower together.
Kurt sings S'Il Suffisait D'Aimer at his engagement party then sneaks out to talk to Puck.
As far as I can remember it wasn't posted on any of the comms.