Mark Estes' desire to “settle down and start a family” led to his split from Kristin Cavallari

Kristin Cavallari and Mark Estes were “on different pages” about their “long-term” goals before their split.

The 37-year-old “Hills” star announced her split from the 24-year-old influencer over the weekend, but an insider told Us Weekly that there was no major drama between the two.

“As they started taking their relationship more seriously, issues started to surface,” the source told the outlet. “They continued to have discussions about the future but did not see eye to eye.”

According to the insider, Estes had been very clear from the start about his desire to “settle down and start a family.”

Although Cavallari – mother of three: Camden, 11, Jaxon, 9, and Saylor, 8 – was “open” to the idea of ​​expanding her brood, she was “very happy with her life and her family,” she said as they are.

“Kristin wasn't sure if she was okay with having another baby,” the insider shared.

According to the source, the 13-year age difference also became a “big factor” in their relationship, as Cavallari loves being “independent” while Estes is looking for something more stable.

“The crucial factor was that they were at different stages of life,” they added.

Despite their split, the source insisted that the two are still on good terms.

“Kristin really liked Mark and enjoyed their time together, and there is no animosity between them,” they told the outlet.

“They really had a lot of fun, but it ran its course. She is excited to now focus on herself, her business and her children.”

The reality TV star confirmed her new relationship status while appearing on Alex Cooper's live show Unwell Tour in Austin, Texas on Friday.

The “Call Her Daddy” podcaster broke the news after calling Cavallari “newly single.” However, the “Laguna Beach” alum did not reveal any details about his breakup at this time.

Just weeks earlier, Estes appeared on Cavallari's podcast, “Let's Be Honest,” to talk about her future.

During the episode, the Montana Boyz member admitted that his “end goal” is to “get married” and “have (his) own child at the end of the day.”

“But I think we decided to just move on,” Estes said at the time. “I don’t think we need to make any serious decisions right now.”

The couple appeared to have broken up shortly after the episode aired.

Cavallari, who shares her children with ex-husband Jay Cutler, began dating the Tiktokker in February and often gushed about their romance — and their “really hot” sex life.

Before her romance with the former college athlete, the Uncommon James founder dated “Bachelorette” alum Tyler Cameron, country hitmaker Chase Rice and comedian Jeff Dye.