Kourtney Kardashian cried over her break-up with longtime boyfriend Scott Disick in a sneak peek for season 11 of E!'s "Keeping Up With The Kardashians," Us Weekly reported. The 35-year-old reality star broke down in tears as she learned of Disick's cheating, which made headlines over the summer.

"Scott is like on a crazy bender," Kourtney said as the clip showed footage of Disick partying in a club.

Kardashian-Jenner matriarch Kris Jenner read off a tabloid headline that claimed Disick was "hands-on" with a stylist. Her anger got the best of her as she insulted him on-camera.

"Piece of sh--," Kris said.

In a chat with her sister Kim, Kourtney broke down as she opened up about why she decided to stay with Disick for so long.

"I've worked so hard to keep this family together," Kourtney said, wiping away tears.

Kourtney and Disick called it quits in July after photos surfaced of Disick getting close to his ex-girlfriend Chloe Bartoli on a vacation in the South of France, as previously reported by HNGN. They were together for nine years and share three children together, 5-year-old Mason, 3-year-old Penelope and 9-month old Reign Disick.

Also, in the teaser for season 11 of "Keeping Up With The Kardashians," Kris and her youngest daughter Kylie got emotional over Caitlyn Jenner's transition while Kim questioned her sister Khloe Kardashian about her rekindled relationship with her ex-husband Lamar Odom.

Watch the teaser trailer below and be sure to catch the next episode of "Keeping Up With The Kardashians," airing Sundays at 8 p.m. ET on E!