With a wedding date in place, social media was thrown into an uproar after the heartbroken new dad took to his Snapchat account to reveal that the mother-of-two had moved out with their daughter, Dream Renee, and everything that belonged to her in the nursery.
From the accusations the pair have been throwing at each other on Instagram, it is clear that the messages with details of Chyna's plans to trademark the Kardashian name after their marriage in July, and others allegedly showing her referring to her fiancé as "fat" and "lazy," while claiming that she would give him a year and then break up with him, are to blame for the nasty split.
The 29-year-old Arthur George Socks CEO, who appeared to have been crying, shared videos via Snapchat showing Dream's empty nursery and the Christmas tree decorations they had set up for the festivities.
In one of the videos, he said, "I've got the Christmas tree all set up for Chyna and the baby but they left me."
Rob also disclosed that Chyna also took all the furnishings from the room that they had decorated for her 3-year-old son, King Cairo, with her ex-fiance, Tyga.
"So I get home and Chyna took the baby, took the whole nursery we built," Rob continued. "And Chyna took everything that we built for the nursery for the baby Dream and she left, and she just left me alone and took the baby.
"I'm pretty upset and I'm pretty sad because it's about to be Christmas and I want to be with my baby," Kardashian added.
Meanwhile, Chyna has been making Rob's shock over their split look like pretence, as her posts on Instagram via a new account, claims that her now ex-boyfriend is mentally deranged and in need of medical help.
Chyna also accused him of hacking her account while declaring that she was done with him and all the troubles that came with the relationship.
The model accused him of being verbally abusive and that he covered up the things he did with expensive gifts.
She wrote alongside one of her posts, "I'M DONE! This entire year I have done nothing but help Rob! It's so SAD & PATHETIC how low he'd stoop to cover up HIS PERSONAL ISSUES! Rob is mentally ill & refuses to seek help! He self-medicates which makes it worse. I have done nothing but help & loved him from the beginning!" she wrote.
"It's Chy here I got my own!!! I was doing swell before I got with him! I got him out of khloe's house, helped him lose all that f--king weight for him to do nothing & gain it all back! Rob asked for all of this! Rob begged me to have Dream! He stressed me out my ENTIRE PREGNANCY!!! Accusing me of cheating, going crazy on me with massive text blast daily! being an absolute lunatic & then cover it up with gifts! I was verbally abused every other day. I was still there with nothing but high hopes for us!"
She also claimed that, following their move into his sister, Kylie Jenner's house earlier this month, Kardashian started "calling me all types of bitches & hoes! AND I NEVER NOT ONCE CHEATED ON ROB! EVER!" I gave him the passcode to my phone I have nothing to hide."
"He refuses to do anything!" she continued. "Eat healthy, work out, work, anything positive, he does nothing!"
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Chyna also claimed that the incriminating messages leaked on Instagram on Saturday, December 17, 2016, were old, while blaming Rob for the hack.
"He only did this because when he went through my phone he couldn't find anything to be mad about! He's on snapchat acting hurt but he's yet to come see Dream yet! He knows where we are!
"Honestly it's only so much a person can take," she went on, "Everyone has tried to help Rob. I've gone beyond to help & so has his family! He's been diagnosed and clinically depressed for 4yrs. I'm done with the situation until he gets help. I have no longer have time to feed into Robert's shenanigans I have 2 children & myself to fend for.
"What hurts the most is watching him do this to me knowing my last situation and promising to never put me through it. Especially after our child is only 1 month. I hope he gets the medical help he needs. If you have ever dealt with a bipolar/depressed person you unders[tand]."
Chyna deleted all of the posts and messages from her new account shortly after she posted them.
As earlier reported, Rob proposed to Chyna back in April this year, after dating for barely two months and reportedly had their wedding date pushed forward because the new mum wanted to have her baby first.