Short story: “Unwell”
by look i have opinions
“Unwell,” by Carolyn Parkhurst
Appeared in the anthology Stories: All-New Tales (2010), edited by Neil Gaiman and Al Sarrantonio, which won the Shirley Jackson Award for Best Edited Anthology
Maybe 8,000 words?
Deliciously nasty. This is the best kind of unlikable character—the one who keeps us guessing what awful thing she’s going to do next.