Listen, this is not so complicated. There are a few options:
Option 1: Stay married and have kids. Life will be peachy. You and your wife will have lots of money, your kids will become Rhodes Scholars and get into the finest schools. Life will be splendid in every aspect.
Option 2: Tell your wife that you do not want kids, and she stays with you, but perhaps resents you. Marriage takes a slow turn for the worst.
Option 3: Tell your wife that you do not want kid, and you divorce. Go your separate ways.
Option 4: Stay married and have kids. Your life is miserable. Your kids take up all your time. You and your wife hate each other, but you stay married for the kids. You sleep in separate beds and never touch each other.
Option 5: You get married, have kids, life is miserable, but you get a divorce. You spend at least 22 years paying child support, and perhaps alimony. You live alone, and hate life.
So, pick your option, and go with it.