The 36-year-old reality star and 32-year-old club promoter downplayed their friendly relationship after posting photos and videos together Tuesday on social media.
Kardashian and Disick were all smiles as they goofed around with a face swap app. The reality star joined Snapchat the same day and shared several posts with her ex-partner.
"By the way everyone relax, people that have three kids together spend time together," Kardashian said as they drove to get gas together.
Kardashian and Disick were together nine years and share 6-year-old son Mason, 3-year-old daughter Penelope and 15-month-old son Reign. The couple split in July but have reunited several times since, although Disick shot down reconciliation rumors this month.
"In the end, I'm trying to live my life," he told People magazine. "I'm trying to live it healthy. I'm trying to be there for the people I love, which is Kourtney and the kids, but you know what, we're not together."
Disick was spotted with 20-year-old model Christine Burke the same day as his reunion with Kardashian. The pair have reportedly spent time together in Las Vegas and Mexico, and sources told E! News the two are getting along well.
"Christine and Scott met through a mutual friend about six months ago," the insider said. "Scott likes hanging out with Christine because she's different than other girls he's been with in the past. He thinks she's innocent and down to earth."
Kardashian and her family will return on Keeping Up with the Kardashians Season 12 on May 1.