The kids are possessed
For a while I thought Flora and Miles would turn out to be the old nanny and peter whats-his-name.
Then I thought they were evil and ghosts were real and they were trying to drive Ana insane. The looks the kids and lesbian housekeeper give each other seem sinister
Then towards end I figured would all just be a dream, or would end with Ana staring into a snowglobe or something lame.
Then finally, after 1.5 hours of trying to pay attention to the movie over my wife's constant "turn this crap off", I still don't fully understand it. lol It's like the money ran out in last 30 minutes and they just jammed it together and sent it off.
btw- I lost my movie picking privileges for a week over this crap