Her Sister's Shoes — Zoe Cannon

Kristen was the bad twin. It was Gilly's job to lie to their parents for her. Kristen cut up small animals when she thought no one was watching. It was Gilly's job to make sure she didn't do anything worse.Until one night, Kristen disappeared.Now Gilly is a cop, finally out from under her sister's shadow. But her mother's deathbed request is to see Kristen one more time. Gilly is the good twin, so it's her job to find her sister. But letting Kristen into her life again might cost her everything.This short story is 10,100 words long. It can also be found in With Friends Like These, a psychological thriller short story collection.