"Oh my god, people are going so crazy. People hate Kim from her comment on the show," Kourtney says to her ex and her sister in the sneak peek.
"They hate me!" Kim says, laughing. "We got into a fight. I said, 'You're the least exciting to look at.' What I meant is you're the most boring," Kim continued, not really helping.
"People think that is like I said, 'Kill your mom,'" she added.
Kourtney was getting a kick out of the shade headed her sibling's way, however, adding that she's even seen comments like, "I've been abused by my family for years and I know that it's very hurtful." Kourt also wasn't having it when Scott attempted to "justify" the comments.
"But that's your sister! You say bad things about her too," he said, adding, "You call her a porn star every time I talk to you!"
Re-watch the original explosion below:
When Kourtney said she even caught some flack, as someone wrote to her, "You should thank Kim for your career," Scott agreed -- joking he does "all the time."
"I was gonna write back and say if it wasn't for my personality and being funny, then our show wouldn't exist," Kourtney said, getting a big laugh out of everyone.
Scott with a sarcastic truth bomb: "For sure, without you, this whole thing wouldn't exist."
"Keeping Up with the Kardashians" airs Sundays on E!