the problem is the pulled teeth, they really tried to hammer it home that someone strong must have done that, so if it's the mother or daughter they've got an accomplice, maybe the dude at the pig farm?
They own that pig farm, they're the richest family there. I would assume whether it's Adora or Amma that did it that they would have seen or even done before plenty of butchering on pigs, I'm sure there is a faster way to take out pigs teeth than what the guy was trying to do.
Edit: just googled it and there are specially made scissors to remove piglet teeth, no idea if that would work on human teeth but you would think so.