After wandering into the old Castle in the Everfree Forest in pursuit of an odd looking hare Fluttershy finds herself trapped inside, and her will being imposed on by the remnants of the powerful being of hate known as the Nightmare...

Audio reading here by Lotus Moon

Surrounded by the Everfree Forest, filled with delinquents, devoid of morals and any real sources of magic, Ponyville is the worst place to live in all of Equestria. But it also has the cheapest rent and Twilight's life just collapsed to the point where she can't afford to live anywhere else.

Perhaps the only thing Twilight has going for her now is that Rarity, the most powerful pony in town, has taken a liking to her. Rarity is eloquent, but the leader of a gang. She's beautiful and intriguing, but the most irreverent and delinquent pony Twilight has ever met. Rumors swirl around her. Some ponies even say she and her entire gang are all vampires.

But Twilight is smart enough to not give in to temptations. Or join a gang. Or become a vampire.

Turns out alicorns are ridiculously fertile. As in 'every time an alicorn has sex, there's a 95% chance they're going to wind up carrying a foal. Minimum.' And this is a problem, because everything else is normal: time spent gravid, mood swings, hormone shifts... it's just not a good idea for a Princess to rule a nation from a constant state of Dam Brain. Plus then you get to the fact that given a typical level of sex drive, there would be an endless parade of heirs galloping around the palace. The line of succession would have a six-mile wait and the front never moves. And then there's just raising all those foals...

In terms of rulership, having somepony in charge who has to live with either the stress of constant celibacy or pregnancy just doesn't make sense. And Celestia has a very healthy sex drive. She just doesn't want to destroy a nation through dealing with the consequences.

So she secretly has a little spell going. Constantly. It's been running for centuries with no signs of slowing down. It does only one thing, and it does that perfectly.

Every time Celestia has sex, somepony else gets pregnant.

Premise from Estee's blog post.

Rated C for Crackfic