The drama went down when Kris Jenner suggested a therapy session during a road trip with her daughters.
Kim Kardashian said she wants to smooth things over with her sister Kourtney, as she admits to being "so mean" to her.
In a preview clip from the upcoming season finale of "Keeping Up With The Kardashians," matriarch Kris Jenner suggested having a little family therapy session while traveling in a van in Wyoming, asking her daughters to "pick one person here and tell them what's the one thing you'd love to focus on to strengthen in your relationship."
Kim -- who was sitting next to Kourtney -- piped up and confessed, "I want to fix my relationship probably with Kourtney, for those mean reasons and those mean comments."
"For you saying them?" asked Kourtney, as Kim agreed, "I can be so mean."
Khloe chimed in and said they both do it to each other, calling it "equal."
As for her family therapy partner, Khloe also chose Kourtney to work with, as they "sometimes fizzle." She added, "I would love to get us back on course and not be so reactive, for myself."