Jessica Harris is making headlines since becoming Scott Disick's girlfriend — and based on her sexy Instagram pics, it's clear that Kourtney Kardashian has some competition!

From sultry bikini snaps to totally nude, it's clear the young model has no shame when it comes to showing off her body. Oh, and did we mention her beachy curls are to die for?

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In Touch exclusively revealed that Scott, who is also Kourt's baby daddy, was spotted kissing Jessica during a trip to Miami — after he got caught sneaking another model on the Kardashian family's trip to Costa Rica. Unfortunately for him, he was found out by the Keeping Up With the Kardashians camera crew — and they immediately notified momager Kris Jenner.

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“They went to get him in his room and saw [the model] standing there. Scott immediately panicked and tried to get them out, but it was too late," a source exclusively revealed. "The crew took down [the model’s] info, made her sign a non-disclosure agreement, and then put her on the first flight home. It’s safe to say that Kris’ plan to get Kourtney and Scott back together was an epic failure.”

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It's clear Scott still struggles to give up his party boy ways. Since splitting from Kourt in July 2015, he's been linked to a string of models — including Christine Burke, Lina Sandberg, and Lindsay Vrckovnik.

Scroll through the gallery to see Jessica's sexiest Instagram pics!