Thread: Costume Party Murder Dream

Alright. My friend has been having this horrible dream ever since she moved into her house (a few years ago). She said there was a homicide/suicide sort of thing that happened there, so here's hoping someone can help her out.
It starts off as her and her sister walking into the house for the party. All of a sudden, the doors lock and they're rushed into a room with a witch. They find out that no one was wearing a costume and go call their dad to come get them. The witch then says that their dad can't do anything about it and they're going to kill them. All this time, their father is trying to get into the house, but all the doors are locked and the windows are nailed shut. The witch then takes out a rope, and bindes my friend's hands to her feet and hangs her from the ceiling, along with her sister. The witch then takes out a knife and puts a damp cloth in my friend's mouth. She then hears a voice that she's never heard before. That says to finish the job. The witch says to give her five more minuets and the door closes. She runs the knife down her face, to her body, and back to her throat. She then hears a breath. Just breathing. Then she cuts her throat.
That's pretty much the end. She's said her dad has had the same dream as well, just in his point of view. Any ideas what this could mean?