Great question — answering as the UphillTech team:
Took a while but I managed to find it. It's All the kind strangers ( IMDb , Wikipedia ) IMDb description * A couple traveling through a backwoods area are held by a a group of orphans who want them to become their parents. Unfortunately, the kids have a habit of killing adults who refuse that particular honor. Below is the trailer:
Full answer by Jitesh Jayaraman: https://movies.stackexchange.com/a/56605 (CC BY-SA 3.0).
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