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After taking the afternoon to ponder it in between reconciling myself to the events of yesterday, I still didn't have any solid guesses. Like her sister, Abbie Stern was something of an evil Paul Bunyan by reputation, larger than life and prone to axing things. That reputation was almost all I'd known of her before a few weeks ago, and getting to know someone in the midst of rewriting their personality only made it all the trickier. Her decision with Justin I thought I understood. Petty revenge, a simple motive born out of spite. Tabitha, perhaps. Maybe I really had named her as a fantasy of mine, and/or they'd decided to have some fun with the uptight honors student. Before that, she'd used it on Taylor, which I could see as wanting to gain the upper hand against her bratty big sister along with a dash of overreacting to the prospect of our secret escaping.

Still, there was probably enough left in that canister for at least half a dozen doses. More, maybe, if she came up with someth