Everything has been said that needs to be. See what hands they're going AI with and make a reasonable deduction of what he has. With a hand like AA or KK an AI move discourages action, and discouraging action is just what you don't want to do with aces or kings. You want to let in a drawing hand and hope they make top pair only to lose to your higher pair. With queens and AI move is more likely, but still unlikely unless the blinds were worth taking (which I assume it isn't if it's a home game). So with AK you should be a favorite against most hands and only a slight underdog to a smaller pair. Again, it's hard to fathom somebody making a huge raise with aces or kings. So call with your AK or AQ and hope for the best. All you can do is put your money in when you're ahead and hope you come out on top.