Sofia Richie was majorly dissed by Kendall Jenner, the younger half-sister of Kourtney Kardashian, after an outing with Scott Disick over the weekend.

After paparazzi caught Richie, 19, and Disick, 34, out with his kids, Jenner shared a message in the comments section of a photo of the group.

“Awww Scott and his kids,” Kendall wrote, pointing out that Richie is much younger than Disick.

“Sofia was really hurt by Kendall’s bitchy comment–they used to be close friends, which makes it all the more upsetting,” an insider explained to Hollywood Life.

Richie also reportedly feels that Jenner's comment about her relationship was completely hypocritical considering the romance between her older sister, Kourtney Kardashian, and her boyfriend Younes Bendjima, who is 14 years her junior and the relationship between Kris and her boyfriend Corey Gamble. As fans of Keeping Up With the Kardashians may know, Kris's boyfriend is a whopping 25 years younger than she is.

“Sofia thinks it was totally out of line for Kendall to be shading her like that. You can’t help who you fall in love with, and Sofia really is in love with Scott, she truly thinks she’s found her soulmate,” the source noted.

Richie and Disick began dating one another in early 2017 but didn't confirm their relationship publicly until this past summer. Around the same time, Kardashian and Bendjima, who has long been a friend to Richie, confirmed their own relationship after several months of rumors.

As for what sparked Jenner to shade Richie in such a public manner, another source claimed the model felt betrayed by Richie's romance with Disick due to their past friendship.

“Kendall was really pissed when Scott started dating Sofia, she was a friend of hers and thought it was just wrong,” a source close to the family told Hollywood Life.

Jenner is also upset with Disick and doesn't understand why he decided to start up a relationship with someone who has been a friend of the family in past years. The source also claimed the model felt Disick's behavior with Richie was creepy since he had been introduced to Richie when she was much younger and spending time with the Jenner sisters, Kendall and Kylie.

To see more of Kendall Jenner, Kourtney Kardashian, and their family including Kylie and Kris Jenner, Kim and Khloe Kardashian, don't miss new episodes of Keeping Up With the Kardashians when the show returns to the E! Network on Feb. 11 at 9 p.m.