In the words of Uncle Jessie, Have Mercy; Justin Bieber has forgot about his age group of women, and moved on to the cougars of the crew. The Biebes posted a photo of himself standing in front of a young lady with legs for days, and the caption “Lord know.” Sources are claiming that young lady is actually 36-year-old Kourtney. While she is denying the rumors of the two seeing each other, sources add that she is telling a big fat fib.

Hit the jump for more.

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Apparently, Justin and Kourtney have been cozying up to each other since an October run-in at The Nice Guy restaurant in Hollywood. As the elder in the situation, Kourtney made a pass that forced the Purpose singer to go full throttle.

We don’t think there are any little Bieber juniors coming anytime soon, “He’s single, she’s single and they’re just having a good time,” says the source. “Nothing serious.”

Hit up the gallery for the pair in a heated position.

SOURCE: TMZ