Not Just Kim?! Kourtney Kardashian's Ex Reveals Bombshell Sex Tape Secret

Did Kourtney Kardashian follow in sister Kim's footsteps and film an X-rated romp with a one night stand? Her most notorious hookup, Michael Girgenti, is revealing his biggest secret yet in an exclusive interview with RadarOnline.com.

As RadarOnline.com reported, Girgenti and Kardashian hooked up in March 2009 while she was on a break from Disick. Then last week, the L.A. model recently made waves by releasing the intimate photo proof of his night with Kardashian exclusively to RadarOnline.com. So, is there video too?

Girgenti admits, "If there is a sex tape, it's not with me! Obviously it would have come out by now if there was."

Rumors of a sex tape starring the oldest Kardashian sister surfaced last month when Disick's former manager Weintraub made the shocking claims in a tell-all interview.

According to Weintraub, the tape was filmed when Kardashian was in college, and her former lover has kept it under wraps for years.

"Maybe, they're just waiting," he said. "If something goes horribly wrong with the business, you could put that tape out to support your family."

Insiders told RadarOnline.com that they believed Kardashian and Disick had X-rated tapes of their own with one source joking, "Who doesn't?"