It's normal for any filly whose aunt has saved Equestria hundreds of times to try and emulate her, and Shining Armor is right there to (blithely) encourage Flurry in her aspirations. Even if they're a tad... esoteric.
Twilight's vacation to the Crystal Empire somehow goes horribly awry, and now she's trapped in an ice cave with none other than Flash Sentry. Can the hearts of these two star-crossed lovebirds thaw out even the chilly Frozen North?
You know the saying, everypony does. It's a city of cheap thrills, vice, and brief momentary flings. Nothing is permanent. Nothing is supposed to last here.