Kourtney Kardashian and Scott Disick are the friendliest exes!

The two, who claim to be broken up, were co-parenting two of their three children when they took the kiddos, Mason and Penelope, to dinner at Sugarfish in Calbasas, Calif.

The 37-year-old reality star and her son were all smiles as they left the sushi spot. For the outing, Kourt wore an oversized sweatshirt with the words "Southern California Football" on it and a pair of sweats. Mason rocked a tie-dye t-shirt and shorts, while Penelope wore a precious little blue dress.

Scotty left the trendy eatery with his oldest kids, opening the door for his wee ones. The dad of three wore a long-sleeved shirt and dark grey pants. He hid his face behind a baseball cap, sunglasses and some scruff.

We don't know how these two exes are doing it -- but they are!