Probably been mentioned dosens of times but... SPOILER?
Later in the film when Marie gets into the truck to leave and the ghost of her mother is banging on the window, the "overanalyze everything" part of me keeps asking: if Marie had the truck, her mother couldn't use it to get away... so I imagine the mother would die at the house, as would the twins if no one went to 'check up' on the family. Then all the rest would have never happened... would that make Marie's daughter disappear?
what do you guys think?
The only difference between fiction and reality is that fiction has to make sense.