Apparently thinking about ponies at work is the equivalent to thinking about them while on crack?
In all seriousness....this shipping, as something short term that goes nowhere that happens after the NNM fiasco and ends shortly after/before Discord is a recipe for good story and character development IMO.
My brain came up with a basic premise of Cadance and Shining decide it's best for their people if they focus more on their careers and cut of their relationship to do so. Luna comes into the picture after the defeat of NMM. She and SA hit it off as friends, and it evolves into something more. But as things get serious questions start to rise, like Luna's inmortality and SA's love for Cadance. Blah, blah, blah. Cadance and SA realize their strong love for each other, Luna gains more maturity. p=