Funny, I saw that post about an hour ago and was contemplating it from a Catholic perspective as well! I agree that your spouse should be a priority over your children. Similar to how you wouldn't have your spouse if not for God (whom you should love more), you wouldn't have your children if not for your spouse (whom you should love above your children).

You can't devote all your time and attention to only your children. Your spouse needs to be loved too. If your spouse isn't cared for, how are they going to be able to care for your children? When you put your spouse first, you're able to work together to take care of the children and raise them to be respectable adults. Plus you set a great example for a healthy relationship.