You must first come together and communicate all the money coming in and how it will be budgeted. Create budget of spending and allowances for each other. Make all decisions together and sometimes be willing to compromise without regrets. Remember you are one you and your partner and what break you break them. Happy family happy life for life. It's always you both against the economy and the world. Communication is the key and be consistent in decisions you both make. How do you manage family finances without conflict?

I believe budget reviews should happen regularly. Partners should share their budgeting plans in order to track their spendings. It helps avoid blaming and finger-pointing in financial issues.