What would you do (Family Vs Army)?

I have a dilemma. I'm 28 years old, married with a baby. My wife has a great paying career. I'm a stay at home dad and TRYING to get a degree. I'm just starting out. The degree plan I've chosen only excepts 20 students every fall so that means they pick the straight A students. I am NOT a straight A student. I brought up joining the Army for the 3rd time in our marriage and she won't have it, hell she border line threw me out after brining up the Army reserves! WTF? My MOS of choice would've been directly relative of my degree plan. This MOS is really hard to get but from what I read on Y!A you just hold out and don't except anything else. I'm confused what I should do. Serving is something I've really wanted to do since I was 24. Now I'm 28.