Is Rob Kardashian dating his sister’s nemesis?

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FILE - Reality star Rob Kardashian has recently been diagnosis with diabetes.

The mystery surrounding Rob Kardashian just keeps on keeping on.

The only Kardashian son — and seemingly the only member of the family who who shuns the limelight — has been reclusive for a while, but that doesn’t mean he isn’t still creating buzz.

The latest chatter is centered around a reported relationship between him and Blac Chyna, a personality who has tons of bad blood with his sisters.

To start with, Chyna is the ex-fiancee of Kylie Jenner’s current boyfriend, rapper Tyga. Chyna and Tyga have a young son together. Chyna has also gotten into it with Khloe Kardashian, most notably over remarks Chyna and her BFF Amber Rose have made about Jenner and Tyga’s relationship.

Oh, and did we mention that Rose is the ex-girlfriend of rapper Kanye West, who is married to Rob’s sister Kim Kardashian?

The whole thing seemed to kick off after Chyna posted an Instagram photo of herself cuddling with a man whose elaborate arm tattoo looks a great deal like one Rob Kardashian sports. The man’s face can’t be seen. The picture is captioned “The beginning.”

Khloe Kardashian stirred the pot even more when she tweeted “You can do anything. But never go against the family,” which she credited to the film “The Godfather.” Naturally, fans took it as a dig at her baby brother, with whom Khloe has lived for years.

Khloe cleared it up by tweeting “You guys do know I have about 100 family members correct? I was referring to a family member who just bailed out of doing my talk show today” but then added, “But hey, maybe my quote can go towards a few people today.”

Naturally, Twitter has been having a field day with the entire situation.

For his part, Rob Kardashian has been pretty quiet, though he deleted all of his Instagram photos with the exception of one that shows him wearing a kerchief over the lower half of his face.

E!, the network home of all of the Kardashian reality shows, confirmed that he is dating Blac Chyna and said he is focusing on getting back in shape after a 100-pound weight gain and recent diagnosis of diabetes.