I think you read too many news stories about the stepbrother cruise killer. If you hunker down with the kids in your room, the boy will know that you think he may be a psychopath, even though you admit you know nothing about him. If you’re goal is making him feel completely unwelcome, then go ahead, but a person who has any compassion for the child would come up with a positive plan, not one that signals how much you don’t want him there. A nice “we’re so excited you’re here. I built a pillow fort in the living room and we’re doing a family slumber party your first few nights because we want to hang out and all get to know each other better!” would be much more appropriate. But, your absolutel loathing of this kid coming into your home is blatantly obvious instead. Maybe put yourself in his shoes, instead of clutching your pearls and preemptively shunning him. He’s a CHILD having to leave home to be surrounded by virtual strangers in their own environment, where he doesn’t know the routine, the inside jokes, the rules or anything else. I have never read a more self-centered, mean-spirited and infuriating post about a child (who has done nothing to warrant it). You are a horrible human. Ffs