Kevin Federline, who got the marital boot from Britney Spears by SMS, was allegedly having an affair with former porn star Kendra Jade a month before the pop princess filed for divorce.
Federline met Jade in Las Vegas in December 2005 while Spears was visiting her family in Louisiana, says newsweek.com.
A source said: "Kev and Kendra had sex at their friends' apartment multiple times, starting in early October. Their friend would phone Kendra and a few other girls to come hang out, and it would always end up with Kevin and Kendra heading off to the spare bedroom."
When asked whether Federline, who is a single guy now, would hook up with Jade as a couple, the source said: "Not likely. They're just friends who have sex."