How to share income after marriage and kids?
I think you have succumbed to a category error. The rational course forward is to classify all property as either his, hers, or family's. Each contributes a portion of wages to the family. Each logs hours spent performing familial duties and is "paid" in virtual dollars into their family account at market rates for that service. At any point actual plus virtual dollars are summed to assess the value of the family and percentages are allocated to each party on this basis. Put this into a pre-nuptual agreement.  At the time of the inevitable divorce you leave with yours, she leaves with hers, family's assets are divided as described, and division of children should be as King Solomon suggested. Or you could do what I did: Put all your property (and debts) into one pot. Make sure each partner can competently manage bookkeeping and investments. Accumulate a family net worth sufficient to divide in two and each have financial independence. (I'm working on this last step.)