"The afterlife is real is that wrong to believe? Nopony never believed in such a thing, the ponies of course I knew at least, it was an otherworldly belief." This was something that she believed, the reason to why she was there. The reason why she was born into an earth pony body in ponyville.
Now seeing this icky black shell. She thought of something horrifying, when born as an earth pony. In the afterlife did she do something wrong? Did...she did something terrible? Being reborn into a world of ponies was for the purest of souls, but now?
She doesn't feel so innocent anymore