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

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

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

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

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

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

Camera-shy: The sisters weren”t so ready to pose as they return to Los Angeles” LAX airport late last night

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

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

Other woman Scott was apparently involved with Kristin Cavallari, Rob Kardashian

Other woman Scottwas apparently involved with Kristin Cavallari, Rob Kardashian”s co-star on Dancing With The Stars and Kourtney”s former friend

Former friends: Kourtney and Kristin were once pals and Kristin dated Kourtney

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

Ex-lovers: Kristin used to date Kourtney

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