Kourtney Kardashian Breaks Down Over Scott Disick Cheating Rumors

— -- In a new preview clip for Season 11 of "Keeping Up With the Kardashians," Kourtney breaks down after rumors surface about her partner Scott Disick.

Toward the end of the clip, Kris Jenner is seen reading reports that surfaced earlier this summer, which have Scott "hands on" with another brunette. Kris gets a bit angry that her daughter might be disrespected by Disick.

"Piece of s---," Jenner shouts out.

"Scott is like, on a crazy bender," Kourtney, 36, also says, while images of her partner show him partying in the club.

Later, Kourtney breaks down, saying "I've worked so hard to keep this family together."

Disick and Kardashain are parents to three children -- Mason, 5, Penelope, 3, and Reign, 9 months.

Also in the preview, we see Kris mourn her ex after Caitlyn Jenner's transformatin is revealed in Vanity Fair.

"He's gone," she says of her ex-husband, now Caitlyn.

Meanwhile, its' not clear if it's related or not, but Disick posted an image to Instagram after the clip went up, that reads, "Just stop."