Before Big Macintosh married Fluttershy, he had a love affair with Cheerilee, who move to Canterlot and bore a daughter, Scarlet Glade.
Scarlet has now grown up, changed her name to Scarlet Gala, and has joined the Royal guard. She is loyal to her job, but still wonders about her father, whom she has never seen, and who is oblivious to her birth.
One day, while on duty, Scarlet sees two fillies in the marketplace, and realizes they are her half-sisters.

A short story inspired by the artwork and character outline of an OC pony created by Coyoterainbow
http://coyoterainbow.deviantart.com/#/d4mpu7s

Story takes place in the My Little Pony:Genesis universe. A fan comic created by Coyoterainbow http://coyoterainbow.deviantart.com/