Do not fight with your wife in front of the kids.
A loving and respectful husband knows that this is one rule that must never be broken. It is wrong and disrespectful of both your wife and the kids to fight with your wife in the presence of the kids. This will also make your children resent you. Regardless of how you may feel about what you think your wife did wrong, wait until you are in the privacy of your room and then talk about it.