The couple were together for nine years before splitting over the summer, reportedly because of Scott's excessive partying. He has since completed a stint in rehab.
Since splitting, the former couple have only been pictured together when they are with their kids: Mason, five, Penelope, three, and Reign, eleven months.
But yesterday, they met for lunch in Calasbasas, California without their brood.
While some fans are no doubt hoping for a reunion, sources in the US have claimed the lunch was platonic, with one insider telling People the couple were not affectionate with each other.
Another source told Us Weekly: "Kourtney is proud of the progress Scott has made since he's left rehab. She's really happy for him. But she's not at all interested in getting back together with him."
Although the break up happened over the summer, it's just airing on TV screens now in the new series of Keeping Up With The Kardashians. In the most recent episode shown in the US, viewers saw Kourtney restricting Scott's access to her home after accusing him of "flaking" on her and the kids.
All you need to know about Kourtney Kardashian:
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!