There may or may not be a Britney Spears sex tape, but one thing is certain, Kevin Federline’s will adopt a no-holds-barred strategy during his divorce proceedings with Britney.

Reports indicate that K-Fed is now contemplating writing a tell-all book about his estranged wife. The wannabe rapper is allegedly planning to make the book so outrageous, that jaws will drop over the juicy revelations.

The jilted hubby, it seems, will soon reveal that Britney is bisexual and begged him for three-in-a-bed romps.

Federline, 28, will say that the Pop Princess regularly fantasised about women and was desperate to share one with him.

A family source close to Federline said he was “prepared to reveal everything in court”.

“Britney has told him more than once she is sexually attracted to women and men equally. She has asked Kevin many times if they could have a threesome,” the Sun quoted a source close to K-Fed as saying.

The wannabe rapper is also expected to claim Britney is guilty of a string of mishaps involving Sean Preston.

Sources claim that he will do whatever it takes to reveal the hidden, dark side to Britney Spears. Fed Ex wants to write about his soon-to-be ex-wife's lesbian encounters, reported use of cocaine and marijuana and secret plastic surgeries.

He's also planning on making a laughing stock out of Britney, by attacking her deepest vulnerabilities and exposing her insecurities about her weight, acne and hair.