Kevin Federline is reportedly set to guarantee he makes plenty of money one way or another from the end of his marriage to Britney Spears.

According to the News of the World, if he doesn’t receive an adequate settlement from the divorce itself - which is unlikely given their strict prenuptial agreement - he is planning to sell the previously rumoured sex tape the couple recorded during their honeymoon.

The newspaper reports that Kevin has already been offered around $50million for the four-hour long tape, which features the then newlyweds in a range of sexual acts and games in a bungalow they rented at the Beverly Hills Hotel.

A source close to Kevin told the paper: “At the time the two of them were in the honeymoon stages of the relationship and couldn’t keep their hands off each other.”

“They did nothing all day but have sex - and play the odd game of chess. They were insatiable and they believed they would be together forever.”

“Britney didn’t think twice about making the video at the time. She mistakenly believed that their love would last. They adored filming each other. They lived their lives in front of the cameras—even making a short-lived reality TV show of their exploits.”

“Sex was no different to them, it seems. Now this video could prove very costly to her. Millions of people will be prepared to pay to watch. Kevin has told Britney she should comply with his demands otherwise the whole world will see her having sex, which will be devastating.”

“At the moment Kev is in talks with a company in Arizona about putting the four-hour sex vid online. If it all goes to plan he’ll make £26million from it.”

Needless to say Britney isn’t best pleased: “She is absolutely furious with Kevin, and knows a full-on sex video could almost certainly ruin her chance of a career come-back. They were made for the couple to watch in the privacy of their home. She never thought that he’d threaten to sell them.”

“Britney has contacted her lawyers to see how she can stop him but it is going to be a hard one. It is his tape, so in theory he owns the copyright.”

An excerpt of the film was rumoured to have been circulating on the internet this week but it was revealed to be a fake.