Sarah (the one whos family got killed) Kills Juno (the one who led them on the tour) at the end because Juno Killed her Best friend On accident but she makes it out and lives but is haunted i think by the ones who died.....not sure though hope this helps(:
From what I remember, Sarah stabs Juno and leaves her to be killed. It shows Sarah escaping and having a vision of her dead friend, but it's a hallucination. The movie ends with Sarah sitting at a dead end, leaning in front of a torch thinking she's sitting across a birthday cake from her daughter. It was creepy and very sad.