US Weekly magazine is reporting that there is a raunchy sex video of Britney Spears and husband Kevin Federline.
The magazine said the video might be released by a member of her entourage and is from her collection before Spears looked pregnant.
The report has not been independently confirmed and details of the existence of such a tape remain unclear.
According to the report, the entourage member is believed to have copied one of the couple's personal video tapes.
"He has threatened to release raunchy footage of the two taken before Spears looked pregnant," a source told the magazine.
During her pregnancy, Spears said that her sex life was the best it had ever been, according to a published report.
