Kourtney Kardashian and Scott Disick Are Not Back Together, Source Says

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Kourtney Kardashian and Scott Disick really are just friends -- for now, that is!

Despite rumors that the on-again, off-again couple has reignited their romance after calling it quits in July 2015, a source tells ET they are not back together.

WATCH: Scott Disick Shares Sexy Photo of Kourtney Kardashian's Butt During Mexico Vacation

"Scott obviously wants to rebuild his family," the source says. "He's in a great place, a much better place than he's been in in a long time. He hasn't been going out partying and has really calmed down on that front. He hasn't been traveling without the family or hitting the club scene. He's trying his very best to get his family back."

According to the source, Kourtney "is never going to hate Scott." He is, after all, the father of her three children, Mason, 6, Penelope, 4, and Reign, 1.

"They have a dynamic family relationship, as confusing as that may be for people to understand," the source explains. "They are successfully co-parenting three of the most gorgeous children. Scott is an incredible father. The kids are obsessed with their dad, and he really is so amazing with them -- Kourtney knows that. They work very well together when it comes to the kids, and Kourtney has never kept them away from their dad."

"Kourtney and Scott were never in a 'normal relationship,'" the source adds. "They had three children together and never were married. A lot of people had their own opinions about their relationship, but they both kept their focus on their unique situation and [never] let other people's opinions get to them. You have to give them credit."

WATCH: Rob Kardashian Practices Daddy Duties With the Help of Scott Disick

The source also tells ET that Kourtney and Scott's relationship is “platonic and loving."

"Their whole focus is having a loving relationship for their kids, and creating a healthy home for Mason, Penelope and Reign -- and they do that," the source shares. "It's very consistent, stable and comfortable for the kids."

According to another source in the nightlife scene, Scott wants to prove to Kourtney that he's no longer known as "the club guy."

"Scott has recently turned down multiple club appearance offers," the source reveals. "He wants Kourtney to think of him as a serious person who is not spending time working in places that could be tempting for him."

Rumors began swirling that Kourtney and Scott were back on after the two were photographed together in Mexico earlier this week, during a getaway to Cabo San Lucas with their three children.

WATCH: Kourtney Kardashian Rocks Super Sexy Tiny Bikini on Mexico Vacation With Scott Disick

At the time, an eyewitness told ET that the former couple looked closer than ever. A source later confirmed that the two were not on a "romantic" trip together -- it was simply a family vacation -- and they were not filming for Keeping Up With the Kardashians.

Hear more (and see the pics!) in the video below.