Britney Spears has apparently put her husband Kevin Federline on a set monthly allowance for his personal use. Which is probably fair enough, as it's her money, but I can't imagine a situation like that contributes much to domestic harmony.
According to The New York Post, a source says: "Any big items - cars, or trips that go over allowance - need to be approved by Brit herself. She acknowledges she has made a great deal of money. However, she is trying to show Kevin that he needs to be responsible and curb his out-of-control spending habits."