Movie Bleg- "Ju-On"

If ANYONE has any idea what the movie "Ju-On" was about, please fill me in. I mean, I get the whole deal about there being some sort of grudge, and anyone who has anything to do with this house disappears. But, the ending. I don't get it. Was it NOT the wife the whole time that was killing people? Maybe I drank too much wine while watching, but the ending lost me.