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Kourtney Kardashian puts on a brave face amid claims Scott Disick had a fling with Kristin Cavallari

By Jade Watkins

Brave face: Kourtney Kardashian put on a brave face as reports emerged that her partner Scott Disick had an affair whilst the couple were on a break

It seems that Kim is not the only Kardashian sibling going through drama.

Her sister Kourtney put on a brave face yesterday as reports emerged that her partner Scott Disick had an fling with another reality TV star while the couple were on a break.

The 32-year-old smiled as she posed with younger sister Khloe at a signing for their new book Dollhouse in New York City.

The reality star looked chic in a leopard print trouser suit, which she paired with a black pussy bow shirt.

Khloe went equally conservative in some wide-leg navy trousers and a black long sleeve top.

She made no mention of the latest family scandal to hit the headlines.

Kourtney's current boyfriend and father of her one-year-old son Mason were accused of 'hooking up' with Cavallari in 2009 in a report published by American magazine Life&Style.

Promotion: The 32-year-old smiled as she posed with younger sister Khloe at a signing for their new book, Dollhouse, in New York City

Camera-shy: The sisters weren't so ready to pose as they return to Los Angeles' LAX airport late last night

The fling is said to have occurred just before Kourtney fell pregnant.

Of course, Cavallari went on to star alongside her brother Rob Kardashian in the current series of Dancing With The Stars.

'While Kourtney and Scott were on a break, Scott hooked up with Kristin,' a source is quoted as telling the magazine.

According to the insider, they first met up during a trip to Las Vegas.

'Scott and Kristin hooked up in Las Vegas during a time [February 2009] that he was on a break from Kourtney,' the source said.

Rocky road: The pair, who have had an on-again off-again romance, with their son Mason

But another friend told the publication that it wasn't just a one time thing, and that the pair were seeing each other 'on and off' for quite some time.

'Actually, Scott and Kristin were hooking up on and off for a year, maybe even two,' the second source claimed.

'When Kourt and Scott would fight, he'd party with Kristin and hook up.'

Other woman? Scott was apparently involved with Kristin Cavallari, Rob Kardashian's co-star on Dancing With The Stars and Kourtney's former friend

Before the alleged flight, the two reality women were pals, after Kristin dated Kourtney's stepbrother Brody Jenner.

Kourtney and Scott reportedly used to party with Kristin at various hotspots in Miami and New York.

But in 2009, Kourtney apparently caught the pair on a date in L.A., which subsequently ended the women's friendship.

'Kourtney was furious,' the friend said. 'She and her sisters have called Kristin "the w**re bag" ever since.'

Former friends: Kourtney and Kristin were once pals and Kristin dated Kourtney's stepbrother Brody Jenner

And when she found out that Kristin would be appearing with her brother Rob on this season's DWTS, she took action.

She banned Scott from going to the shows, which she regularly attended with her family to cheer Rob on.

'Scott and Kourtney argued about Kristin,' the source said. 'Kourtney can't stand her now and didn't want Scott at show tapings.'

Following the reports, Cavallari appeared on U.S. TV Show Access Hollywood to deny she had ever hooked up with Disick.

She said: 'First of all, it’s 100 percent not true.

Ex-lovers: Kristin with to date Kourtney's stepbrother Brody Jenner

'I just think, what convenient timing for them with their show premiering next week and with everything that’s going on for Kim, I feel like they’re trying to take the heat off her.

'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, so it’s very… it’s really disrespectful to me and I’m in a committed relationship. It’s disrespectful to me and Jay [Cutler] and I think it just says a lot about their character.'

A spokesperson for Kourtney was not available for comment when contacted by MailOnline.



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