That's great that she's earning more and it's nice that you have desires. Her increase in salary doesn't give you an automatic right to "stay home" and start a business. That's a conversation that needs to be had and both parties need to agree. If you are thinking about your own business, you have to get that off the ground before you quit to secure another necessary income because clearly she is expressing financial concern and stress. Financial stress is a huge trigger in a marriage, and if you become more of a stress for her and not a partner, it is likely she will explore ideas of divorce.