Boy, bye! Kourtney Kardashian opens up about her frustrations with ex Scott Disick in a preview for the Sunday, Oct. 8, episode of Keeping Up With the Kardashians. The mom-of-three — who shares Mason, 7, Penelope, 5, and Reign, 2, with Scott — goes in on her baby daddy during a heated discussion with momager Kris Jenner.

“He’s jealous because you were having fun, spending time with other people,” Kris, 61, tells her eldest daughter in the sneak peek, referencing a recent vacation that Kourt, 38, took without Lord Disick, 34, in tow.

“Well, that’s really not fair. It’s just, like, I can’t even live my life. I can’t even go anywhere. He needs to get a f–king life and leave me alone!” Kourtney fires back at her mom. “And all he does is try to make everybody else feel bad for him, and try to make me look like the bad guy in the situation when clearly I’m not. You know, from 10 years of this going on.”

However, Kris — who is known to side with her famous daughters’ deadbeat exes (ahem, Lamar Odom) — then makes an attempt to guilt-trip Kourtney. “Wouldn’t you be said if he truly left you alone?” the KUWTK matriarch asks. “You always want what you can’t have and when somebody’s right there giving you there heart on a platter—”

scott disick kourtney kardashian - getty

(Photo Credit; Getty Images)

But Kourtney’s having none of it. “He’s not! He’s not, though! If he was, that was one thing, [but] he’s not. Mom, that’s what he makes it seem! To you, to Kim, to Khloé, to the world, to everybody,” she fumes. “He sits there and grovels and feels bad for himself, so if that was his truth, why can’t he get it together?”

The brunette beauty then seemingly makes a dig at Scott and his string of hookups — including former Disney Channel star Bella Thorne — from earlier this year during a getaway to Cannes, France. “I have to handle it when he’s out photographed, you know, with a different hooker every day,” she quips.

This scene was presumably filmed months before Scott started dating Nicole Richie’s 19-year-old sister, Sofia Richie. A source recently told Us Weekly that Kourtney is understandably bothered by Scott’s fling with the teen socialite. “Kourtney thinks this fling with Sofia is a little weird, but nothing shocks her anymore,” said the insider. “Kourtney just wants Scott to be his old self. She shares three kids with him, so she’ll always want the best for him and will always make sure he’s happy.”

Keeping Up With the Kardashians airs on E! Sundays at 9 p.m. EST.

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