Money can be a major hurdle in relationships, married or not. Generally I find that one side of a couple tends to be stronger money wise.
In my case, I tend to be far better with money than my wife. Bailed her out of debt three times and then basically sat her down and told her what we're going to do. When she was working, all the money would go into one account, all bills etc would be paid from there, a joint credit card allowed us to spend on what we wanted without buggin each other but a basic rule that she lets me know of any purchases greater than R300. I also transfered a fixed amount into her account each month that she could do whatever she felt like with. Worked well for us, been married happily for 8 years and we are financially secure, although a bit tight now as she's at home with the little one.