I know that it's your dream to go to law school, but it sounds like you decided to do other things with your life. You decided to get married, have 2 babies, buy a house with a substantial mortgage, and take on a lot of debt for something you were pretty sure you didn't want to do. It seems like you have a stressful life right now, and maybe daydreaming about becoming a lawyer provides a nice escape. However, it doesn't seem like your family can afford for you to have another experiment with expensive grad school.
Why don't you wait to go to law school? You could pay off -your- debt, and maybe spend some money towards investing in your husband's education/earning potential. You say that you're the breadwinner, well, maybe you can take up some of the slack to allow him to pursue a graduate degree. It's hardly fair for you to help yourself to all of them!
I know you'd like to go to law school, but you've signed yourself up for a lot of obligations that just aren't going to reasonably allow you to do that. But don't worry. You've got a long time. Even if you have to wait ten years until your kids are older, you've paid off your debt, and you have the mortgage a little more under control, you can still go back to law school then.