Kevin Federline's brother says Britney Spears' son is his

**FILE** Britney Spears, right, and her husband Kevin Federline are seen in this Feb. 8, 2006 file photo in Beverly Hills, Calif. A court commissioner in Los Angeles said Tuesday, Aug. 14, 2007, he would consider a motion by a magazine and a TV station to unseal documents in the Britney Spears-Kevin Federline divorce case. (AP Photo/Danny Moloshok, FILE)

December 27, 2012 12:00:00 AM PST
Kevin Federline's brother, Chris, now says he slept with Britney Spears while she was married to his brother.

The bombshell was revealed in Chris' application for a temporary restraining order against her, according to E! Online.

Federline says Spears harassed him and stole his credit card - spending more than $4 thousand on a shopping spree. He claims she used the affair as leverage over him in recent years.

Spears' camp has not made a comment.