Los Angeles, July 26 (IANS): Reality TV personality Rob Kardashian and his fiancee Blac Chyna "are not broken up" though the former stopped following the model on Instagram.

Rob, 29, hinted at the engaged duo's first big argument on Monday when it was discovered that he had briefly stopped following Blac, 28, and deleted all traces of her on Instagram. 

The couple, who announced they were expecting their first child together, have been recently filming their upcoming E! reality show "Rob & Chyna", during which they had a disagreement, but they didn't part ways, reports people.com. 

"They are not broken up," a source close to Blac said. "They filmed over the weekend and had an argument," another source shared. 

"It's hard to see Rob and Chyna actually splitting. Rob is looking forward to becoming a dad. It would take a lot for him to break up with her." 

The mother-to-be continues to sport her seven-carat engagement ring amid her tensions with Rob.