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.
I was hard on myself during my time as Princess Twilight's student. Nothing but my studies had mattered ever since she saved me from my own magic. When I finally burned out, Equestria was on fire.
Cadance was curious as to why a kirin was sitting at their dining room table. What she finds out was definitely more than what she could consider. Not that Shining Armor helped at all.
She's always been told to stay away from the woodline- that to enter the forest would be to provoke death. And only a few dread stories as to the horrors that would see the deed done...
She tried to give her a chance, she tried to redeem her. But the time for that has passed. And now Princess Flurry Heart must confront the villainous Cozy Glow and settle things once in for all.
After rescuing Princess Flurry Heart from a frigid limbo with the help of the Crystal Heart, Sunny wonders where to go from here with the first alicorn Equestria has seen in centuries.