Somebody higher up already said what I think the issue is...you don't like your brother-in-law. I'm sure this is a common issue with most families, everyone has that person that gets under their skin and each little thing we blow up because of this. Not really your right to say how much time he does or does not spend with his family or how much his wife is doing. Your not doing that to your wife and kids, not your problem.

Now the games are you babies, it irritates you that he is playing them at all let alone playing for hours. Christmas is almost over, enjoy what you can, he's not going to break anything that can't be fixed.