The number one reason for breakups in marriage is not infidelity, it's financial pressure. It's one partner outspending the other. This really matter in the first three years of a marriage, because you can see disastrous outcomes if somebody is a spendaholic and the other is not, and they never discuss this or talked about their financial goals in the first place. The first child you have in a marriage is money. You both have to have separate bank accounts. You should fund a mutual one that pays for mutual expenses, but keep all of your financial structure intact under your own name, and that's very important.