Us Weekly reports that Britney Spears is so suspicious of hubby Kevin Federline leaking information about their private lives to the tabloids, she’s took preventative measures. “Britney knows Kevin tells his friends information, knowing they will leak it to tabloids,” a source close to the pregnant pop tart told the mag. Spears never told K-Fed she was going to announce her pregnancy on ‘The Late Show with David Letterman’. “They sell stories for money,” the source added. “She is sick of him using her for them to profit.” Read more.