I wake up with a pounding headache…and a light tugging on my ankle. With effort, I keep my body relaxed but not unnaturally still; that’s the trick to pretending to sleep. I learned it early on as a kid, not that it did me much good. The bed shifts slightly as Abby sits up. She pushes the covers aside. The slightest tug and a whisper of air tell me she’s trying to untie the string. I stay very still and let her do it. The string tickles my skin as her end of it falls to the bed. She makes it to the door before I spring up and push her from behind, pressing her into the wall with my body—not
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