Justin Bieber hooking up with Kourtney Kardashian is "creepy," proclaims Kendall Jenner.

Justin Bieber & Kourtney Kardashian Enjoying Secret Affair For Months: Scott Disick & Kendall Jenner Stunned

Justin Bieber once was linked to Selena Gomez as his forever girlfriend. They even had their own nickname, Jelena. And for an even longer period of time, Kourtney Kardashian was associated with the father of her little children, Scott Disick. But now that Selena has moved on and Scott got in trouble for partying with former gal pal Chloe Bartoli, that leaves Justin and Kourtney with each other.

And it’s not a new affair. Kardashian and Bieber have been secretly canoodling for months, according to Us Weekly.

“Justin and Kourtney have been hooking up since late August, early September,” an insider revealed to Us.

Bieber, now 21, shared news of his romance with others by bragging, and a different source explained to Us that 36-year-old Kardashian was more in a partying mood, making them an ideal couple.

“Justin started hanging out with Kourtney alone because she started going out more,” added that insider.

So how does a stunned Scott feel about the situation? Disick is coping fairly well because he’s all too aware of the headlines that he’s earned by cheating on Kardashian, but he’s also finding it distasteful, Us Weekly’s source revealed.

“[Disick has] had so many stories about him recently, he has no reason to be pissed. He feels like he has to take the humiliation. Scott feels she’s doing this to get back at him and get revenge. He feels he has to take it and can’t say anything after all he did to her, but he thinks it’s dumb and immature.”

But an insider shared that Disick remains sober and involved with his children.

Scott Disick reacts to Kourtney Kardashian's relationship with Justin Bieber.
Scott Disick reacts to Kourtney Kardashian’s relationship with Justin Bieber. [Photo by Chris Weeks/Getty Images for Calvin Klein]

As for Kourtney and Justin, the rumors continue to heat up, especially when Kendall Jenner was seen at a party with the Biebs, and he seemed to be careful to show that he’s just friends with Kendall, reported People.

That’s quite a contrast to what a source revealed to People about Kardashian and Bieber. The insider shared that the couple couldn’t be separated, describing them as “super touchy-feely” throughout a date night in West Hollywood at The Nice Guy.

Then came a contrast sighting of Kendall and Justin showing up separately after Bieber performed on The Voice. Jenner and Bieber minimized their interactions, making it clear that they were platonic pals. They also left separately.

Kendall Jenner reacts to news that Justin Bieber is hooking up with Kourtney Kardashian.
Kendall Jenner reacts to news that Justin Bieber is hooking up with Kourtney Kardashian. [Photo by Frazer Harrison/Getty Images]

Looking for a public statement from Justin about Kourtney? Nothing so far, but Bieber and Jenner have been friends for a long time. However, Justin also shared a picture of himself earlier this year enjoying a swim with Kourtney’s little boy Mason.

“Mason is as cool as a fan,” wrote Bieber.

But Kendall Jenner isn’t so cool with the idea of Justin and Kardashian hooking up, according to In Touch.

Shocked by the news, Jenner is summing up the new relationship as “creepy,” partly because she regards Bieber as her pal and the former boyfriend of her own BFF Hailey Baldwin. Kendall also feels Justin is too young for Kourtney.

In addition, Jenner reportedly feels that Kardashian and the 21-year-old “player” have nothing in common. Although Kourtney and her young boyfriend attempt to minimize their flirty fun when Kendall is present, she’s aware of the romance and allegedly considers it “bizarre.”

Any chance that Kardashian could decide to dump Bieber and go back to Scott Disick? It’s not likely because Kourtney has resolved to stay friendly with Scott only for their three children, according to the Daily Mail.

To look for a way to keep Disick involved in raising her children, Kardashian has turned to how Kris Jenner and Robert Kardashian stayed in touch and shared parenting duties after their own divorce. But when it comes to romance, Kourtney has resolved that she’s not meant to be with Scott.

[Photo by Xaume Olleros/Getty Images for Calvin Klein]