If I may make a suggestion. Why not put both of you on an allowance? Let's say that you each get $100 a month that you can do with as you please. You can spend it on whatever you want. Let's say that you only spend $50 one month... now you have $150 to spend the next month. If you want something that costs $200, you have to wait a month so you can save it up. That way, neither of you is dipping into your main account. That's an easy way to get into trouble!

Hope that helps!

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