Kourtney Kardashian, Justin Bieber Dating 2015: Scott Disick Reportedly 'Embarassed' About Rumors [VIDEO]

Scott Disick might be an honorary member of the Kardashian clan, but rumor has it that his ex-girlfriend Kourtney Kardashian of E!’s Keeping Up With The Kardashians, has moved on with another celebrity, and he's livid about it.

Is Rob Kardashian Suing His Family?

Kardashian and singer Justin Bieber were spotted together at West Hollywood’s The Nice Guy earlier this month.

One insider told Page Six they were “nearly inseparable…They were smoking on the patio together and were super touchy-feely.”

WATCH: Are Sisters Kylie & Kendall Jenner Feuding Because Of Tyga?

They then headed to Blind Dragon before Kardashian left at 12:45 and Bieber dipped about an hour later.

It’s said that Kardashian hung out with Bieber to get revenge on Disick. They split after he was spotted getting extra close to another ex he dated while he and Kardashian were on a break.

A second source confirmed, “The Bieber thing was definitely a bump in the road. He was super pissed about it…when that came out. Hearing she’s partying with this A-list superstar with way more money than you, whether [it’s romantic] or not, it’s embarrassing!”

As for Kardashian’s family, it doesn’t look like they care either way.

“When he’s not there, no one’s thinking about Scott. They literally don’t talk about him. Everyone has their whole thing going on…I don’t think anyone cares if [Scott and Kourtney] are together or not.”

Still, Kardashian is definitely thinking about him considering he’s the father of her three children. So when it comes to Kardashian and Disick possibly rekindling their romance, there’s hope.

“It goes back and forth depending on the day of the week. She’s been letting him see the kids and they’ve been trying to work on [possibly getting back together], but nothing has been decided.”