The 36-year-old "Keeping Up with the Kardashians" star visited the Beverly Hills Hotel along with Disick and two of their three children, Mason, 5, and Penelope, 3, reported People magazine.
"Kourtney and Scott acted cordial. They were mostly focused on the kids. Scott looked very happy to see the kids," an onlooker said.
The reality star brought Penelope to Disick's Beverly Hills home, after the hotel visit.
"Scott and Kourtney chatted and seemed okay. Kourtney seems to be making an effort so Scott can spend a lot of time with the kids," the source added.
"He's got a long way to go, but he's taking some steps that are encouraging," an insider said.