The Uninvited
The Uninvited concludes with the rather depressing truth: Anna's (Emily Browning) sister Alex (Arielle Kebbel) and mother (Maya Kemp) both died in the boathouse fire caused by none other than Anna herself. Anna, who was institutionalized after their deaths, had been hallucinating Alex the whole time. After being placed under arrest for the murders of her ex-boyfriend Matt (Jesse Moss) and her father's girlfriend Rachel (Elizabeth Banks), Anna returns to the institution.