That's What Friends Do

Lila needs this sleepover to go perfectly. If she looks like she's fitting in with the popular crowd at her new school, her mom will stop watching her so closely. She won't threaten to send her back to the hospital. She'll forget all about what Lila did, and why they had to move. So Lila will impress the popular girls. In fact, she intends to be their new best friend--whether they like it or not. This short story is 5700 words long.
It can also be found in With Friends Like These, a psychological thriller short story collection.