Just one day after Scott Disick was caught kissing model Jessica Harris in Miami, sources reveal the playboy snuck a woman into his hotel room while vacationing with Kourtney Kardashian and her family in Costa Rica!

“Scott’s been hooking up with a young model… He actually flew her to Costa Rica and tried to hide her in his hotel room without the Kardashians knowing,” an insider told In Touch, though it’s unclear whether Jessica is the model in question. He was eventually busted by the Keeping Up With the Kardashians camera crew.

MORE: Scott Disick Refuses to Go to Couples Therapy With Kourtney Kardashian!

“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,” the source shared. “The crew took down [the model’s] info, made her sign a non-disclosure agreement, and then put her on the first flight home.”

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Scott with a mystery blonde on Jan. 31.

The incident apparently led to a confrontation with Kris Jenner. “It’s safe to say that Kris’ plan to get Kourtney and Scott back together was an epic failure,” the insider added. The 33-year-old had previously been uninvited from the South American trip after partying all night during the Sundance Film Festival last month.

As Life & Style exclusively reports in this week’s issue, Kourtney thinks she’s pregnant with baby No. 4, but her ex isn’t the father. Recently, she’s been hooking up with much younger model Younes Bendjima, who sources say is the dad if she is, in fact, expecting.

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“Kourtney wouldn’t mind having another child,” an insider tells Life & Style. “She thinks that she was truly put on this Earth to be a mom.”

When the reality star was spotted leaving a Beverly Hills hotel with Younes in December, a source said, “[He’s] quietly sparked a relationship with Kourtney and really fancies her… there’s a real chemistry between them.”

Scroll through the gallery below to see Kourt and Scott’s cutest photos with their three kids!