Kevin Federline is going to write a shocking tell-all book about Britney Spears that will include details about her drinking, alleged drug use, and her sexual attraction towards other women, according to Star magazine.
“Kevin is either hoping a publisher will pay him big money for the book,” a source said, “or that Britney will cough up more cash than what’s in their prenup to keep him from spilling the beans.”
K-Fed reportedly is seeking sole custody of their two sons and at least $20 million of Brit's money, reports Star.
He is alleging that he can “prove that Britney is an unfit mother” by revealing her partying ways both while she was pregnant and when their babies were born - and is preparing to use a video he shot — which has appeared on YouTube — in which Spears babbles incoherently.
“Kevin says he filmed it just a week before Brit filed for divorce,” the source said. “He told me, ‘I want the world to see that Britney is an unfit parent and that she’s not in her right mind.’”


