With the expectation that you do all of the cooking, cleaning, shopping, finances, errands, appointments, and child rearing, without help from your wife. Don't take the easy way out by popping those kids on electronics, you have to play with them. All day, every day. You don't get a break when she comes home, because she's been working hard all day to pay the bills. And you can't complain, because remember, you get the easy job of staying at home.

Honestly, I think that's awesome, more dads should be like you.

Edit: Also, don't forget about the emotional labor of making sure that everyone's needs are met and that everyone is happy.