On the way into his favorite adult store in search of some new and exciting kinky toys, Derek bumped into a sweet, but slightly crazy, fortune teller. She insisted on doing his cards for him, and the Ten of Cups was in his future — the ""Happily Ever After"" card.
Neither Derek nor Amy had been thinking of ""happily ever after"" when they set out on their affair — which was just as well, since they were far more likely to end up with a Kinkily Ever After.