Holy crap y'all. This was super creepy in a way that felt very original. I certainly haven't read anything quite like this. I feel like I can't say much w/o giving away more than I should. This definitely has me wondering how many people don't change the locks when they buy a new (used) house? My hubby and I have only moved a few times but changing the locks always happened on move in day! I suspect I'll be thinking of this story for a long time.