Maybe like .. ya know at the end it could be that Piper or all of the famiyl could be looking at the Book and all of a sudden on a blank page, words start to write and it says stuff like: I'll always be watching over you .. and just some sweet thing and then end with the name: Prue
Sry I was just thinking .. maybe this way Shay doesn't have to be in Charmed but it's a sweet ending that has kinda something to do with her? lol I know I'm weird but I was just thinking..
<3 Ash