It's that part in almost every horror movie where the paranoia kicks in and people turn on each other in last 30 minutes except here it's the whole movie. It was extremely predictable and offered nothing new.
They should have called it Nothing Comes at Night because there sure as hell weren't any monsters. The scariest part of the supposed horror movie was that one poster.
I actually liked that there was no supernatural/monster element to it. That's what I expected from the title of the film, which makes it an odd title, but I liked that it was just normal, good people in a really shitty situation. This was an excellent film.