King Cairo - Chyna's little boy with ex Tyga, who is now dating Rob's sister Kylie Jenner - took inspiration from the reality TV star and wore a black T-shirt, black sweatpants, faux tattoo sleeves, a Los Angeles Dodgers baseball hat and Gucci slide sandals.
Posting a video of her son on Instagram, Chyna wrote: ''This is the cutest thing ever I must say!! King doesn't want to be the Ferrari man anymore for Halloween but instead wants to be Rob!!!''
And when King was asked why he wanted to dress like the 29-year-old sock designer, he simply explained: ''Because I like him!''
Not to be outdone by King, Chyna - who is expecting a daughter with Rob - dressed up as her other half to film a hilarious video for Instagram.
She donned Rob's clothes while her friend dressed up as her and in character, she cooed: ''Oh baby I cant wait till our baby girl is here,.''
The friends then staged a fight as 'Rob' shouted at 'Chyna' for eating fries in the car.
'Rob' yelled: ''I mean can I get some help I'm driving here!''
But 'Chyna' insisted: ''These are my fries!''
The posts come after singer pilot Jones posted pictures of him and Chyna kissing, insinuating she was cheating on Rob.
But she took to Instagram and wrote: ''OK let's state the facts!!! I have been quiet for too long!!! This was over two years ago people!!! I never had sex with him! NEVER EVER! Nothing ever happened past these pics.''
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