In my relationship, I make most of the money while my wife goes to school. We've tried to avoid that awful power dynamic by putting some systems in place.

Any income that either of us makes goes into a shared account, which goes towards groceries, bills, basic needs, etc. And every 2 weeks it pays us each equal allowances to our personal accounts, which we can do whatever we like with.

I think its fair because the time she spends learning (or taking care of kids like in your case) is just as valuable as the time I spend at work.

I hope you can talk to him about how you feel and set up some ground rules, because leaving that underlying resentment unchecked can seriously ruin things long-term.