In Silence Alone

Monstrosities have torn apart most of Equestria's inhabitants, and Twilight Sparkle's castle is the final monument standing, buried in a sea of writhing flesh and terrifying creatures.

This is it. The last of everything. The downfall of this planet. The dreadful capability of noiselessness; the nightmare of a world gone wrong. Horrifying creatures are left among Ponyville. One alicorn remains. After taking down the dragons, forest animals, and the entire crystal kingdom, there are only a few monuments left to stand, Twilight's lone castle as one of them.

Though, the monsters outside aren't the biggest problem...

Deviant highlights (by chapter):
I: cunnilingus, 69, edging, role shifting, stealth sex, grinding
II: wakeup sex, orgasm limiting, estrus transfer, BDSM
III: In Progress (as of 11-17-16)

Incomplete

Sex

Horror

Sad

Drama

Gore

My Little Pony: Friendship is Magic

Dark

Romance

Thriller