There were plenty of tears on Sunday night's episode of Keeping Up With the Kardashians.
Kourtney was left upset after she discovered that Scott introduced his girlfriend Sofia Richie to their children.
Speaking to Scott, Kourtney was hurt, despite the kids having met her now ex-boyfriend Younes Bendjima.
"The thought of my kids being introduced to another woman and having somebody else in their lives, it is hard for me and hard for them. There is a lot going on for them."
Kourtney called Kim when she was hurting looking for advice.
Speaking to the cameras, Kim said "I think it is just more of a principle that they made this rule and have been going to co-parenting therapy together, and I want to be there too support Kourtney and Scott, but it is really their thing and I do not get involved."
Scott then explained to Kris why he did it. He said they agreed with the therapist that they would do it.
Kris replied "I don't understand why she can introduce her boyfriend to the kids but you can't introduce your girlfriend, because she is my daughter I don't want to go against her, but I see your point, too, so I would ask her why it isn't mutual."
After that, the pair had a tense stand off which you can see here.