Kourtney Kardashian has given ex-boyfriend and father of their three kids Scott Disick another ultimatum before she decides to take him back.

Aside from going to rehab, Kourtney has requested that Scott stop seeing other women, including his rumored new girlfriend Lindsay Vrckovnik.

A source told HollywoodLife that Kourtney appreciates Scott's decision to enter rehab for his alcohol problem. But it's reportedly not all that she cares about. The "Keeping Up With The Kardashians" star is reportedly still wounded from seeing photos of Scott getting flirty with 18-year-old model Vrckovnik. Likewise, a source claimed she still has not moved on from believing that he had hooked up with his ex-girlfriend Chloe Bartoli even while they were together. So Kourtney's other condition basically boils down to his womanizing ways.

"This time it's a little more personal because he was caught looking flirty with another girl, and she's still embarrassed by that situation. So, it's not entirely about the alcohol problems, there's more to it than that, and she can't forgive him entirely. He has to get his act together in more ways than one, by being a reliable partner and father to their three kids and stopping his womanizing ways," the source said.

Kim Kardashian's friend Jonathan Cheban remains hopeful that Kourtney and Scott will get back together. He told People in a previous interview how they are just perfect for each other and that he is certain that they will work things out.

"There's three kids, he lives not that far from her. Once he gets this out of his system I'm hoping that it will be somewhat back to normal," he said.

TheDishh.com founder further said that he hopes they will get back together so can visit Scott and Kourtney's family as a whole with their three kids, Mason, 5, Penelope, 3 and Reign, 10 months.

Kourtney's mother, Kris Jenner, had previously also expressed how she still has a soft spot for Scott. Like Jonathan, she too wants her eldest daughter to "figure things out" with Scott.

Scott has reportedly also checked into rehab again to get help for his alcohol addiction. Sources for TMZ said he checked into a facility in Malibu on Oct. 14 while his former brother-in-law Lamar Odom was still in a coma in Sunrise Hospital in Las Vegas. It's believed Scott finally decided to seek medical intervention so he can have unsupervised visits with his children.