How (and when) you spend it, save it, or make it, money is one of those things that can easily trigger tension in a marriage. Disagreements about finances make matters dicey, especially when it gets in the way of working together as a team, Cohen says. Someone might think their partner spends too much, another might be worried about their partner's debt, and, in some cases, couples can't compromise about what to spend their money on. Over time, the strain gets to be too much. What’s mine was once yours, but not anymore.
