Kristin Cavallari has hit back at claims she had an affair with Scott Disick.

Slamming recent reports by Life & Style Magazine that she hooked-up with Kourtney Kardashian’s babby daddy back in 2009, she told The Billy Bush Show,

"It's 100 percent not true."

But rather than shrug off the allegations, which suggest she had a fling with the club promoter right before Kourt got pregnant with the couple’s son Mason, the ‘Hills’ star has hit out at the Kardashian crew.

“With everything that’s going on for Kim, I feel like they’re trying to take the heat off her," she said.

“When there’s a big story like that, they always call you and ask if you want to comment and clearly none of them denied it.”

And she didn’t stop there! K-Cav, who recently reconciled with her ex fiancé Jay Cutler, ranted,

“It’s disrespectful to me and Jay…and I think it just says a lot about their character.”

Relive more Kristin drama from ‘The Hills’ in the video clip below…

Justin and Kristin wonder if their rekindled ...

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