KUWTK Reunion: Kourtney Kardashian Says Ex Scott Disick's 'Substance Abuse Was the Deal-Breaker'
The Keeping Up with the Kardashians reunion special is almost here - and host Andy Cohen isn't shying away from the tough questions.
In the new sneak peek at the upcoming "Housewives-style" reunion, airing in two parts beginning June 17, Cohen covers everything from Kourtney Kardashian and Scott Disick's breakup, to Tristan Thompson's cheating scandals and Kris Jenner's relationship with ex Caitlyn Jenner.
The special will air one week after Thursday's series finale of KUWTK, which has come to an end after 20 seasons on E!
"Welcome to a sit down 20 seasons in the making," the Watch What Happens Live host begins in the new clip. "For the first time ever, I'm grilling the Kardashian-Jenners."
"My mom's a bit nervous," Kim Kardashian tells Cohen behind the scenes.
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RELATED: KUWTK Finale: Kourtney Kardashian Says She's 'Over' Her Family 'Enabling' Ex Scott Disick
"Why is the show coming to an end?" Cohen asks the family, including Kylie and Kendall Jenner as well as Kris and Kim, Kourtney and Khloé Kardashian.
"We're all feeling a little overwhelmed, we've done it for so long," Kris replies.
Kim, 40, then opens up about a mysterious moment between her and her mom.
"What people don't know is you said to me, 'I'm gonna put you in a car, no one will find you - just leave,'" she says as Kris, 65, adds, "And I'll take care of it."
Cohen then asks Kim about her apologizing to an unnamed man. "Do you think you owe him an apology?" he questions, to which Kim says, "Absolutely."
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RELATED: Kim Kardashian Talks Kanye West on KUWTK Finale: 'I Didn't Come This Far' to 'Not Be Happy'
Conversation next turns to the relationship between Kourtney, 42, and Disick, 38, who split for good in 2015 after dating on and off for nearly a decade.
"Do you think your relationship might have turned out differently if you hadn't shared so much of it?" Cohen asks.
"Probably, but I think the substance abuse was the deal-breaker," says Kourtney, referencing her ex's past struggles with alcohol. (The star checked himself into rehab twice in 2015, and again sought treatment last year.)
"I was pretty irresponsible," Disick tells Cohen, who goes on to ask Disick about Kourtney's new relationship with Blink-182 drummer Travis Barker.
Watch: Is a more 'permanent future' on the cards for Kourtney Kardashian and Travis Barker?
"So do Kourtney and Travis have your blessing?" he says, though the clip doesn't show any response.
Next up is Khloé, 36, and her relationship with Thompson, 30, whom she got back together with last year following his multiple cheating scandals.
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"When Tristan first cheated on you, how did you know it will be done again?" Cohen asks Khloé before the teaser concludes with one last question directed at matriarch Kris.
"Kris, have you forgiven Caitlyn for how she treated you?" Cohen asks Kris about her ex.
The Keeping Up with the Kardashians series finale airs Thursday at 8 p.m. ET on E!, with the first part of the reunion following at the same time on June 17.
