Kardashian, 28, posted a NSFW post on Instagram early Wednesday morning that read "When the p---y good but your family don't like her so you drop your family and become an orphan."
In addition, the reality star, who has been dating Blac Chyna since January, captioned the quote with a couple of face with tears of joy emojis.
Rob Kardashian and Blac Chyna Share PDA Pics'
Blac Chyna has a complicated relationship with Rob's family, and a source previously told PEOPLE that Kylie Jenner is "livid" about the relationship.
The 27-year-old was once close friends with Kim Kardashian West, but that friendship went south when Blac Chyna's ex-fiancé Tyga began dating Kylie. The former couple share one son – King Cairo, 3.
Rob's sisters Khloé Kardashian and Kourtney Kardashian recently took to their social media pages, expressing to fans that they both miss being around their younger brother.