In your heterosexual marriage, who earns more money?

My wife is disabled with severe chronic pain and so can’t guarantee that she will be able to work on any given day which puts a huge damper on her employment prospects. So I’m basically the sole bread winner at the moment, but not particularly out of choice. She’s thinking about starting a home business painting and making jewelry. I’m hoping she makes it big and then sells out. I’d have no problem being a kept man.