Scott Disick and Sofia Richie are reportedly enjoying a nice and easy relationship with one another years after his split from Kourtney Kardashian.

According to a new report, Disick gets along with the teenage model quite well and when it comes to the nature of their relationship, they appear to be involved in a serious romance.

“At first, nobody thought Scott and Sofia would last more than a couple of weeks, and everybody is shocked they’ve been together this long, most of all Kourtney [Kardashian],” an insider revealed to Hollywood Life on Dec. 10. “There’s such an age difference between Sofia and Scott, but then, he’s really just a big kid at the heart of it, so it all evens out at the end of the day.”

Disick is 34 while Richie is 19. However, their 15-year age gap isn't the only substantial age gap happening in the world of the Kardashians. In fact, the age gap between Disick and Richie is about the same as the gap between his ex-girlfriend, Kardashian, and her new boyfriend, Younes Bendjima, who is 14 years her junior.

According to the Hollywood Life report, Disick believes that his relationship with Richie is much less difficult than his relationship with Kardashian because Richie doesn't nag him as much as Kardashian reportedly did. Instead, he and his new leading lady are able to focus on having fun and going on adventures with one another.

While only time will tell whether or not the couple's relationship will stand the test of time, Disick is said to be quite happy with the model and feels that she's given him a new lease on life.

As for how Kardashian feels about the relationship, another Hollywood Life insider said that the 38-year-old mother of three is quite hurt by Disick's decision to put an end to his partying ways for Richie after failing to do so for her.

“It’s really hurtful that all the time they were together he carried on with his hard partying, despite the fact that they had three kids together—but, as soon as he starts dating Sofia he suddenly changes,” a source said. “Kourtney can’t help but wonder why he would do it for Sofia, but not for her.”

Keeping Up With the Kardashians season 14 airs Sundays at 9 p.m. on the E! Network.