One time my mother-in-law went over there to pick the boys up, and the front door was open. She walked in, went into the boys' room and talked to them for a while and went and found the brother-in-law. He didn't know she was there til she walked into the room he was in. Anyone could have walked in and snatched my nephews or they could have wandered off on their own, and he wouldn't have noticed til his wife asked where her children were.
He's another one that is only on the computer "for a minute". I don't know who they think they're fooling. I'm sure he's forgotten to feed them, too.