I agree that the two of you need to decide on a budget. Often people just allot a small amount of money for discretionary spending a month. Figure out what you can afford after all bills are paid and groceries and gas bought.

Do you have a joint account? If so, I would check it regularly so that you know how much money is in it and what it's being spent on.

It's also a good idea to get down to just one credit card and pay it off in full each month.