Hollywood rumors just heard SCOTT DISICK cheated on partner and baby mama, KOURTNEY KARDASHIAN with KRISTIN CAVALLARI way back in 2009 just before Kourtney was pregnant with their son.

kourney kardashian scott disick life  style cover

No wonder Kourtney banned Scott from “Dancing With The Stars” taping sessions or from cheering for Kardashian brother Rob during the 13th season of “DWTS” where Kristin was also a contestant.

Scott and Kristin hooked up in Las Vegas during a time [February 2009] that he was on a break from Kourtney.”

A source revealed.

At that time, both Kourtney and Scott were good friends with Kristin dating back to her “Laguna Beach” days when Kristin used to date Kourtney‘s half-brother, Brody Jenner. But when Kourtney caught Scott and Kristin on a date at the Apple Lounge in LA on March 2009…

Kourtney was furious,”

a friend said.

“She and her sisters have called Kristin ‘the whore bag’ ever since.”

So when it was announced that both Kristin and Rob vying for the mirrored ball trophy for the 13th season of “DWTS,” Kourtney took matters into her own hands.

Scott and Kourtney argued about Kristin,”

the friend continued.

Kourtney can’t stand her now and didn’t want Scott at show tapings.”

Did the Kardashians use their influence on their millions of social media followers to vote Kristin off (she was eliminated on the third week) despite her high scores that averaged cumulatively higher than any of the contestants who had lasted twice as long as she did?

We won’t be surprised if they did…remember when Kim duped people into voting for Rob by giving out a number and claiming it was Justin Bieber‘s?

But what has all this brouhaha done to Scott and Kourtney‘s relationship?

Rumors have it the couple slept in separate rooms during the filming of “Kourtney and Kim Take New York.”

Good thing she isn’t married to him, eh? That’d give the Kardashian family another headache of a divorce to muddy their already sullied name.

Image via Life&Style magazine

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