Sofia and Kourtney have worked really hard with Scott to get their relationship to a mature place, with it on the road to being one big happy family, even though it started off extremely rocky.
So what could have happened to make it all go wrong?
Unfortunately, we don't know. However, Kourtney never once followed Sofia back during their 'amicable' times, so maybe Sofia has had enough of playing nice with nothing in return.
Or maybe it has something to do with the fact that Sofia has recently revealed to Entertainment Tonight that she does not want to appear on Keeping Up With the Kardashians anymore.
"I want to get into acting!" she explained. "I feel like, for a while, I kind of held back on things because I was afraid of failure, but 2020 is [the year of] no fear! I'm gonna be doing acting stuff really soon," adding that "great things are happening and I'm really excited about it."
The possibilities are truly endless, but with both Sofia and Kourtney deciding to step back from the show, we're imagining Kris Jenner is pretty livid that this drama probably won't be televised.
Sofia still follows Scott on Instagram, so any thought of a potential break up is certainly not on the horizon (we hope).