Do I allow the dark spirit to take over the heroine's brother's body? It would make an interesting scene down the road, but totally screws up some equally great scenes later on. Thus defeating the purpose of lengthening the book! But on the other hand just giving the illusion of the dark spirit taking over the brother's body would keep the reader on thier toes wondering what he was going to do next - hmmm..
Haha ha ha! (evil laugh) I do love playing puppeteer to my characters!