“Keeping Up With the Kardashians” star Kourtney Kardashian might be embarrassed that news of her tryst with “What Do You Mean” singer Justin Bieber leaked, but the pop star is thrilled to be with an older woman, Hollywood Life wrote in an exclusive report Tuesday. Even though he is best known for his hookups with girls his own age, there is a 15-year gap between Bieber and the reality star.

One of the things the Canadian heartthrob loves about the mother-of-three is that she is “dominant.” “She’s seasoned and mature, and her energy compliments Justin’s. Not to mention, he loves older women,” an insider told Hollywood Life. “He loves how most of them are dominant and know exactly what they want. Kourt doesn’t play childish games like women his age, and he loves that. His respect level for Kourt is through the roof because of it.” The person added: “Justin has a real genuine interest in Kourtney.”

While Bieber, 21, is excited about the romance, Kardashian, 36, has denied it, TMZ wrote Monday. The only problem is that various news outlets have confirmed the two are an item. They apparently started the fling in October. "He's single, she's single and they're just having a good time. Nothing serious,” a source told TMZ.

They were pictured together over the weekend at the Nice Guy in West Hollywood Friday. "He and Kourtney were nearly inseparable — smoking on the patio together and were super touchy-feely," a source told People magazine Monday. She reportedly left his hotel in Beverly Hills at 4 a.m. local time, TMZ added.

Like some shocked fans, sister Kim Kardashian West thinks the fling is absurd. “It’s like Kourt has a fourth child on her hands now. Justin is so young and so immature. The thought of Kourt being intimate with this little boy makes Kim sick to her stomach,” an insider told Hollywood Life.

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