For a couple of weeks, Applejack has been heading out every full moon, saying she has "business" to attend to, but she won't tell you what it is she does. Not believing your wife's constant reassurance that she's alright, it's on the night of a Lunar Eclipse that you make it your mission to discover what it is she does on every Full Moon in Equestria. Little do you know, you're gonna be in the doghouse for the night.

(This story is kinda like the Flutterbat clopfic, just FYI)