[TechnoViking]

When life gets complicated, you have to get back to the basics. Ask yourself "what is in the best interest of my children?"

Your duty as a man is to do what is in your kids' best interest. Not even your wife's desires in this matter are as important as you setting the standard for what is acceptable behavior around your kids.

Being around a drunk is not OK for your kids. It doesn't matter who he is. A drunk is a drunk and he should not be around them.

So it's simple: Grandpa is not allowed around your kids when he's drinking. Period. If he can't go a couple of days at Christmas without drinking he needs to get help or stay someplace else. Be a man, and stand up to the family. You have to do what is right for your kids.