This time, it's 19-year-old model Bridget Satterlee, and you can see all the photos of them getting cosy and making out here.
Now, it finally looks like Kourtney has had enough, and has banned him from seeing his three kids, Mason, Reign and Penelope.
"What she is upset about is her kids and she wishes Scott would keep them in mind. One day they are going to be old enough to read about this stuff and understand what is going on," a source close to the family previously told E!
"It's unfair to the three kids and it’s really disappointing considering Scott had made a lot of progress. To throw it all away like this is very concerning," they continued.