Lol exactly
Here is the real deal:
Your health should come before your family. I am not saying spend 7 days per week in the gym. However, your overall health should become your family. Why? Because if you're 6 feet in the ground then you're no good to your wife or your child. Your overall health will dictate every aspect of your life, i.e., whether you're able to go to work, play with your son, etc. You should be allowed some time to care for your health.
This is also why your spouse has to come before your child. Your marriage is the cornerstone of your child's future. Parents cannot fathom putting their spouse before their child. But its necessary.
Too bad your wife is not looking at it like this.