King Sombra has been convinced that friendship is magic and after a dozen months getting to know one another, he and Fluttershy turned out becoming each others' special somepony.

Once upon a time, on a Hearth's Warming Eve, twelve months of dating later, Fluttershy and Sombra have gone through a lot together and tonight, after all the waiting she's put Sombra through, Fluttershy thinks she's finally ready to take this relationship to a more intimate level.

Cover cropped from art by Evehly.
Skip the prologue if you don't want any backstory before the sex.

A Sombrashy clopfic.
Contains: Cock worship, anatomically correct genitals, sexual pheromones, oral sex reciprocation, wingboners, cum guzzling, lewd talk, subtle cum inflation, impregnation and heartwarming love and affection.