podcast, host Amanda Hirsch brought up Kourtney's relationships with her sisters.
The TV personality reminisced over her bond with Khloe and how Kim was the "outsider" of the group.
That dynamic supposedly changed, with Khloe and Kim getting closer and Kourtney stepping back from the pair.
Kourtney theorized that her sisters' newfound closeness was due to motherhood as the two welcomed children at the same time.
Kim's third child, Chicago, four, was born in January 2018 via surrogate, while Khloe gave birth to her firstborn child, True, in April of that year.
The famous Kardashian sisters also share a similar motherhood journey as Khloe followed in Kim's footsteps and went the surrogacy route to have her second child, a son born in August.
Kourtney admitted: "I just felt like they really bonded - like they were going through the same things."
She continued: "And then I felt like that's when I was unhappy with the show - particularly because of the two kind of ganging up.
"Almost everything that Khloe and I had done to Kim, and they were kind of flipping it on me."