“The way Kylie tells it, Sofia deserves a chance and it’s not right that Kourt keeps causing drama for her and Scott," said the source.
Kylie, 21, hasn't been trying to hide the growing friendship. The makeup mogul even posted photos of her partying with Richie, 20, on June 22 at a mutual friend's birthday bash.
“This is going to get ugly really soon,” the source added. “Kourtney expects unconditional loyalty from her sisters."
Readers know Kourtney, 40, and Scott’s past has been the cause of worry and concern in his current relationship with Sofia.
The trio had even begun to travel and hang out together, but things regressed once again following the KarJenner family trip to Bali when a renowned healer revealed Kourtney and Scott were “soulmates.”
“Sofia is already super jealous of his relationship with Kourtney, and although Scott tells Sofia that she is the one for him, she will always feel inferior to Kourtney,” a source exclusively shared at the time.
Radar reported she’s even beginning to grow “impatient” and question whether Kourtney is the reason Scott’s been stalling on her dreams to get married and have a baby.
The tensions heightened even more when Kourtney was spotted vacationing with Scott and their three kids — without Sofia.