Sofia subtly addressed her goodbye on Instagram with a poem in December. It read, “You loved the person I was, I love the person I become.”

Three months later, Scott revealed one of the biggest reasons for the breakup, which actually had to do with his ex. Kourtney Kardashian.

On a new episode of Keeping Up With The Kardashians, he said, “I feel like she was just about to kick Kourtney out … And I said, ‘This is the most important thing to me, my kids, and this is my family – and them only family I have including you guys. ‘”

The father of three said she didn’t want to share it with Kourtney. According to Scott, “she then literally said, with an ultimatum, ‘You have to choose me or Kourtney.'”

After the reveal aired on KUWTK, an insider claimed Sofia just wanted to move on.

“It was no secret that they had their ups and downs when it came to Kourtney,” the source shared. “When Kourtney and Scott got closer and started spending more time with the kids, Sofia had a big problem with it. She thought she was going to lose him to Kourtney and was jealous at times.”

The source also said that she wished the ultimatum “stayed private” between the couple. “Sofia moved on and left the drama behind. At this point there is no chance they will ever get back together,” added the insider.