The 36-year-old reality star ran into her 32-year-old ex-partner at the studio Monday and shared a series of playful Snapchat videos with her followers.
"Hey, so we wanted you guys to hear it first -- we are getting back together," Disick said in one of the clips before kissing Kardashian's head. The star laughed, responding, "No."
Another post shows Kardashian and Disick joking around as he puts her in a mock headlock. Kardashian asks Disick to respond to a question before he grabs her right breast.
The flirtatious videos caused fans to speculate the former couple may indeed be getting back together. Kardashian told her followers to "relax" about a possible reconciliation this month, saying, "People that have three kids together spend time together."
Kardashian and Disick were together for nine years and share 6-year-old son Mason, 3-year-old daughter Penelope and 15-month-old son Reign. They split in July but have reunited several times since, including for a family trip to the Wizarding World of Harry Potter.
"We're not together," Kardashian said on The Ellen DeGeneres Show in January. "I feel like every day is different, but we're totally getting along. We have three beautiful kids together ... He's family. He'll always be."
Kardashian and her family will return on E! series Keeping Up with the Kardashians on May 1.