I had a dream my wife was possessed by a demon and she was trying to kill me.?

Last night I had a dream that my wife was possessed by a demon. She was trying to kill me. In the dream it was just us two, and we were running around my house. I even got in my car to leave, but she popped up in the car as I was backing out. Every time I would wake up and fall back asleep the dream would pick up where it left off. At one point in my dream she was trying to get me to sleep with her, but I felt it was wrong because it was a demon not my wife. I tried praying and tried exorcising the demon but she would just laugh. ..... what could all this mean?