Kourtney Kardashian went to lunch with son Mason and daughter Penelope on Sunday, and while she's been able to keep her composure in public after splitting from partner Scott Disick, poor little Mase looked incredibly bummed!

Kourt and Scott's oldest child hung his head as the trio walked back to the car -- even a set of brand new Legos couldn't cheer him up! Earlier this month Kourtney dumped Scott after he was photographed all over his ex Chloe Bartoli on a yacht in Monaco, and Scott hasn't even SEEN his three kids since then.

While Scott has been throwing wild parties at his Beverly Hills bachelor pad, apparently he has spoken to his children. Hollywood Life reports that Kris Jenner set up the phone call, and when Scott finally got Mason and Penelope on the line, he broke down in tears.

"Scott called Kourtney and their conversation was very brief. He didn’t ask her how she was doing or much about her at all. She asked him where he was and when he was coming back, as they need to sit down and discuss things, but Scott didn’t have many answers. He really just wanted to talk to the kids. As soon as he heard Mason’s voice, tears started streaming down his face in buckets. He did his best to not let the kids know he was breaking down, but he was balling his eyes out. He wished Penelope a happy birthday and told the kids he loved them. When they told him they missed him and asked him when he was coming home, it was like a punch to the gut. He told them soon and then got off the phone," a source told the site.

So...are Scott and Kourt done for good then? Because after reading that, it seems like there could still be a chance!