"You know what I hate the most? Whack ass bitches. ... Worry about yourself," Blac Chyna said on Snapchat

By Aurelie Corinthios
Updated February 03, 2016 10:00 AM
Steven Lawton/WireImage; Paras Griffin/Getty

brightcove.createExperiences(); Rob Kardashian is taking his relationship with Blac Chyna a step further by bonding with her son.

On Tuesday, Kardashian, 28, took to his newly-debuted Snapchat account to share a video with his girlfriend, a few of her friends and her son King Cairo.

King Cairo, 3, is Blac Chyna’s child with her ex-fiancé Tyga, who is Kardashian’s sister Kylie Jenner‘s boyfriend.

Blac Chyna, 27, posted her own Snapchat later in the day to send a message to haters.

“You know what I hate the most? Whack ass bitches,” she said in one video. “All right, so, I go on Instagram and my Snapchat and people is talking s— about Rob. Right, you’re a weak-ass bitch.”

“Right, exactly please come harder,” she taunted in another video.

“What’s so crazy is like you bitches are so f—ing concerned. Worry about yourself. Worry about your f—ing account,” she added. “Imma give you guys like, the benefit of the doubt, you haters. These are the same bitches talking s— time and time again. Like, worry about yourself.”

In another video, Blac Chyna referenced the fact that Kardashian has remained out of the public eye and away from the Keeping Up with the Kardashians cameras in recent years while battling depression and significant weight gain.

“I’m about to tell y’all something,” she said. “So he’s been like, low-key for three years and y’all bitches ain’t about to run him back in.”

Given Blac Chyna’s complicated history with the Kardashian-Jenners, the relationship has created tension – particularly after Blac Chyna was arrested Friday on public intoxication and drug charges, with police saying she was in possession of two ecstasy pills and acting “unpredictable” and “angry” at the Austin, Texas, airport.

“It’s troublesome that she was caught with drugs,” a source told PEOPLE of the family’s reaction. “There is a concern now that Chyna might not be great for him. Nobody wants their relationship to have a negative effect on Rob or end badly.”

For more on Rob Kardashian’s relationship with Blac Chyna, her arrest and how the Kardashian-Jenner family is reacting, pick up this week’s issue of PEOPLE, on newsstands Friday

Although Kardashian rushed to Blac Chyna’s aid after she was arrested, a source told PEOPLE he “seems a bit disappointed” about her recent legal trouble – though for now, he remains hopeful that she can help him make positive changes in his life.

“It seems Rob has this idea that his life with Chyna will be so much better than his old life. He is clearly making an effort to change his negative ways,” the source said. “The question right now is just if Chyna is able to continue to be a good influence on Rob.”