The 29-year-old reality star shared Snapchat videos of the 28-year-old model's baby bump following a conflict with his sisters and rumors he and Blac Chyna had split.
Kardashian posted clips of Blac Chyna's bare belly from bed as he and the model attempted to catch their daughter moving. He captioned one video, "She ain't moving for the camera."
The first-time dad-to-be had tweeted half-sister Kylie Jenner's phone number Monday amid drama over a baby shower. Sources told E! News the star's family had planned a party specifically for Kardashian and not Blac Chyna.
"Didn't invite the Mother of my child to a baby shower you all were trying to throw for me!? You all must have lost your damn minds," he wrote.
News outlets later reported that Kardashian and Blac Chyna had broken up. Sources told E! News the pair are still together but are currently living in separate homes.
"Rob and Chyna are fine," an insider said. "They are together, but it's just difficult right now. They are living separately because that makes for a more harmonious life for the two of them. They just bicker a lot."
"Filming [Rob & Chyna] has been a lot of stress on their relationship," a source added to Us Weekly. "Add to that Chyna's pregnancy and the fact that Rob and his moods go so up and down."
Kardashian and Blac Chyna got engaged in April after three months of dating and announced they're expecting the next month. Rob & Chyna, their E! series, airs Sundays at 9 p.m. ET.