Wow... That was horrifying. Not in the psuedopod way, in the OMG look at myself way.
That was so dark and so wonderful.
I never blamed Alyssa, she was afraid for her sister, say no way out of the system and would rather her sister live a while as a witch than be killed.
Unlike others I never saw the ending coming,
As for the idea of Alyssa returning for revenge, I hope not, the town will self destruct on it's own honestly. There's no force on the outside that could pose even a credible threat to it, but it's own greed is eating it alive from the inside and a more and more rapid pace. They've consumed the foreigners for their power, they've consumed the poor, they turn on their own children, sacrifice their future for present benefit, and more and more they turn on their peers. It's unsustainable. I'd love the super dark follow up, of the last 2 free people in that town, battling till one of them's witch dies... And then the last free person. Alone with their witch...