Kourtney Kardashian and Scott Disick
Scott Disick and Kourtney Kardashian reportedly checked into the same hotel during their trip to NYC with their three children.Getty Images

Almost a year and a half after confirming their relationship, Scott Disick and Sofia Richie have taken the next big step and moved in together. But according to a report by Hollywood Life, it's been revealed that the big move in is not a recent update.

"Sofia moved in with Scott this past summer," a source close to the couple told the outlet. Not only was it a big move for the couple but also for Kourtney. "And that's when Kourtney realized things were really getting serious between them." But, Kourt was definitely not left in the dark about her former partner's plans. "Scott and Kourtney discussed his plans on living with Sofia before they made it official." However, Kourtney was exactly thrilled about the milestone in Sofia and Scott's relationship.

The source went on to say, "Scott could tell Kourtney was a bit jealous at the time, but more so concerned of the fact that their kids would be sleeping there while Sofia lived there, too. She wanted to make sure they were in good hands."

Kourtney, Sofia and Scott then had a face-to-face discussion about the new living situation. "After Scott and Sofia had been living together for a few months, Kourtney and Scott felt it was best for all three of them to meet up together since their kids would be spending the night there on a regular basis," said the source. "That's when they all went to dinner together in November. It was important for Scott that Kourtney felt comfortable with Sofia and got to meet her, so she could see for herself that Sofia truly does care about, and treat their children amazing."

It appears that things have definitely improved between the ladies as they spent time together on their much-talked-about vacation in Cabo San Lucas, Mexico with Scott in December last year. Sofia also scored invites to both the Kardashian' Christmas party and the Aspen holiday trip.

The insider finally concluded, "Although Kourtney was initially concerned, the ladies have come a long way and built a much stronger bond than ever before."