Because he figured out that it's able to control if him he's on his own, or isolated. [ He's trying to be cool about this, but he wants Nancy to believe him. He doesn't want this to be a problem. He doesn't want billy to be a problem. ]

So when he's around friends, it keeps it at bay. That's how El got through to him, remember? It's being alone that lets it get at him. And he's been living with us for two months now, and it's been-- [fine is the wrong word. It's Deerington, nothing is fine. He knows things have happened that Billy hasn't told him.] okay.

I promise it's okay. If I thought it wasn't safe, I wouldn't let the kids anywhere near him.