Image imported from derpibooru
Original Description:

Welp here’s Hearts and Hooves day!
But who needs all these dates, valentines and cafes if it’s enough just to retire at home with your super-duper special pony and spend the whole day in bed, warming up by the hearth in this cool February day, listening to music and more than once clearly demonstrating to each other your sincere and very strong love?
Fluttershy doesn’t like crowds of ponies, and Rainbow only needs just one under her wing on this day, so these two quickly figured out exactly how they would spend this day and night.

And thanks to my dear friend for huge helping with lighting!