Disick, 34, was spotted taking his son Mason to see a movie to celebrate his birthday weekend.
While Scott and Mason saw a movie together Sofia, 19, was spotted at Barney's New York in Los Angeles laughing with graffiti artist Alec Monopoly.
Disick and Richie have been inseparable in recent months although she has never been photographed with any of his three kids.
It has been rumored that Scott and Sofia will film some reality show scenes together in 2018.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at firstname.lastname@example.org, or call us at (866) ON-RADAR (667-2327) any time, day or night.