“Friends,” by Laura van den Berg
Appeared in the anthology Tiny Crimes: Very Short Tales of Mystery & Murder, edited by Lincoln Michel and Nadxieli Nieto and published by Black Balloon, an imprint of Catapult; appeared in Catapult on June 1st, 2018
The part about the mother is fascinating.
“Am I a terrible person?” Sarah asked.
“Yes,” Holly said. “That’s what makes you perfect.”