I wanted to add that if you tell the kids they can't walk to their friends house, that you DO NOT tell them anything such as.... "Your mom doesn't.. or your mom won't... or your mom.. DO NOT GO THAT ROUTE. Use I have decided or We have decided or Your mom and I have decided... You gave a very telling clue to your situation when you told us that the kids "whisper in your ear" things they would like to say to their mother when she gets mad. BIG NO NO... You should be telling the kids don't talk about your mother like that, she loves you.. or something like that. That is a very weak position to take for you and believe me.. SHE SEES it and notices that you and the kids do that behind her back. Not good..
Also.. I know you would like to rush ahead here, but remember that right now you need to focus on the basics..
Grip, stance, alignment.. Which means in relationship terms... Learn to act and be happy and enjoy life, keep your grip light (no pressure or relationship talks) pursue your own interests and enjoy them and be emotionally strong around your wife.
When you start to go wrong.. As in golf.. Go back to the basics.. Grip, stance and alignment... Too much information to digest sometimes will confuse you, just as it does when trying to work on your golf swing. One thing at a time works much better until it becomes a habit you don't have to think about....