No idea, never got to the end The moment the pipes in the bathroom started shuddering, then split open and splurted blood out all over the place, I was reaching for the off button!
That happened during the daughter's birthday party. The father had rigged the pipework himself, along with all the other noises and happenings.
As a result the father wrote a book about the house being possessed, which became a best seller. All the mothers of the girls at the party vouched for what happened, which helped the book sell so well.
The final scene is the father receiving the royalty cheque, laughing about how much money he had made to the wife, and the daughter, who had gone a bit head mental by this stage, realised she had been used by the father to make him rich, and so picked up a knife, Michael Myers style, and stabbed her dad through the heart.