“The family was horrified at the entire thing,” a source close to the family tells PEOPLE of the situation, which resulted in Rob being ordered by a judge to stay at least 100 feet away from his ex and being banned from posting personal photos or information about her and her children, per a set of restraining orders granted on Monday.
“Rob has been on such a good track lately and he used really poor judgment here and got emotional,” the source adds of Kris Jenner‘s only son, 30, who repeatedly shared graphic and expletive-ridden content about Chyna, 29, on Twitter and Instagram July 5 while accusing her of drug use, alcohol abuse and infidelity.
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Another insider has told PEOPLE that the family is “deeply disappointed and frustrated” with Rob because of his online outburst, but they remain focused on being supportive of Dream, Rob’s 8-month-old daughter with Chyna.
“In the end it’s about Dream and Rob has to grow up and be mature enough to realize that and how this can impact her later in life,” says the KarJenner family source.
“Everyone has been skeptical about Chyna and her intentions from the get-go but because Rob was so happy, that’s what mattered to them so they were as on board as they could be,” adds the source. “But once there was a child involved, the game changed.”
The restraining order against Rob is set to remain in effect until the next hearing on Aug. 8.