In a preview of Sunday's new episode, Kourtney calls out Kim and Khloe Kardashian for not respecting her boundaries by following her with cameras to a private home.
"I'm here for a meeting! Do you wanna come inside? I'm not literally dating anybody," she tells them. "But we don't know, because we don't know anything about you," Khloe shoots back.
While she wasn't with a man, Kourtney was angry that she could have been -- and she has made it clear she wants her relationships off camera. "What if I actually was, then what?" she asks. "Like you'd bring the cameras here? It's so disrespectful."
"If I have boundaries, respect them," she tells them, as Kim rolls her eyes while saying, "You and your boundaries." After saying Khloe "likes to show every single thing" about her life, Khloe says she does it because "it's our job."
In a confessional, Kim agrees with Khloe, saying it is their job and Kourtney "hasn't really been open about her personal life on camera" for a few years now. "All the days Kourtney isn't filming, Khloe and I are picking up the slack and having to share more. If we're not sharing our lives, what is the show?"
Khloe then accuses her sister of "coasting" through the show, asking Kourt if she thinks it's "fair" she's not as open as the rest of them.
"I said I would not share my relationships, that's it," Kourtney shoots back. "I shared my breakdown crying about having anxiety, I share other things. I'm not like, turn the cameras off!"
In her own confessional, she adds that she would never pull what her sisters just did by following her with cameras in an attempt to "expose" her.
Back in November, Kourtney made headlines when she said she plans to take a step back from the reality series she and her family created back in 2007.
"I've just decided to spend more time as a mom and put more of my energy there, but I'm not saying goodbye," Kourtney assured Entertainment Tonight in an interview alongside sisters Kim and Khloe. "But I think you'll have to see more of it on the new season, Season 18, which isn't airing yet, but it's being filmed, currently, in this room."
When asked whether the show can go on without Kourt, Kim and Khloe seem to think it can -- but also aren't convinced she won't be back in full capacity.
"Yeah, I mean, we definitely love Kourtney and will miss Kourtney and whatever she decides to do, but people come, people go all the time in this family," Khloe explained. "I feel like it's a revolving door. So Kourtney might leave this week; she'll be back. They all come back."