[spoiler] Man, screw those kids. [/spoiler] An agonizingly slow film. I was personally satisfied with the ending, but that most likely depends on whose "side" you're on throughout the movie. [spoiler] Those kids 100% deserve what's coming to them. I understand resenting your potential step-mother, but psychologically torturing her to believe that you're all in purgatory and must do penance so you can enter Heaven is simply too much, even accounting for childish immaturity. Even if Grace did not kill them after the final scene, them having to live with the guilt of knowing they caused their father's death is also a fitting fate. [/spoiler] Depending on whether you believe [spoiler] the kids, it get a bit interesting when they say that they're all in purgatory, but really ramps up during the last 10 minutes when they're desperately trying to undo the damage and convince Grace that they're actually alive. [/spoiler]

While I have no problem with having to suspend disbelief to a certain extent, I find it really hard to wrap my head around how [spoiler] these two young kids concocted such an elaborate plan: drugging Grace, the fake obituary, convincing lies, hiding all their belongings, Aiden pretending to hang himself (what?!?!). Maybe I wasn't paying close enough attention (because I was so bored), but I don't understand how the kids knew that Grace was mentally disturbed enough to be susceptible to their gaslighting. The dad wanted them all to spend time at the lodge so they could "get to know each other," which implies that the children didn't spend a lot of time with Grace. The condition Grace has isn't even explicitly stated in the film, and the kids don't seem to know what she has, only knowing that she takes pills. How did the kids know that withholding her meds would have made her easy to manipulate? Did they just do it and hope for the best? Also, while the kids did see that creepy religious cult video, just how could they know the extent of the trauma the cult inflicted upon Grace? Given the kids' ages, I highly doubt their father told them in detail about Grace's past. So it seems that their meticulous, elaborate plan all hinges on the wild assumption that without her meds, Grace is a highly susceptible individual, which is just so, so incredibly stupid. Maybe the filmmakers were trying to tell the audience that kids can be extremely smart but also extremely stupid at the same time? I have no clue. [/spoiler]