Rob Kardashian and Blac Chyna 'are now living together'

Rob Kardashian has apparently moved in with new love Blac Chyna, despite the disapproval of his sisters.

The reality television star is said to have caused a massive family rift through his romance with Blac, who is the ex of Rob's half sister Kylie Jenner's boyfriend Tyga and the mother of his three-year-old son.

According to sources, Rob's relationship with Blac is moving incredibly fast, and they are already cohabiting.

TMZ reports that Rob has been living at Blac's house for the past five days, and has been taking advantage of her plush pad - which includes a well equipped gym to help the 28-year-old lose weight and combat his health struggles.

"Rob is using Chyna's home fitness equipment to train, with a little inspirational help from her," a source told the outlet.

The allegations about Rob's new home come after it was reported that his sister Khloe Kardashian, with whom he has lived for the past few years, has kicked him out because she is so furious about his choice of girlfriend.

It was apparently Rob - who has been struggling with his weight and was diagnosed with diabetes last year (15) - who made the first move in the romance, by direct messaging Blac a fortnight ago.

However, his family are said to be worried that Rob, who they allegedly think is "horribly depressed", is being taken advantage of by Blac, who they believe is "playing into his insecurities for her own gain".

"Rob genuinely likes Chyna and is not hooking up to upset his family... but it has definitely upset the Kardashian brood," the source added. "They believe Chyna is manipulating everything and that SHE is the one who first reached out."

The romance has apparently hit Kylie the hardest.

As well as her very public spats with Blac, Amber Rose, who's the ex of Kylie's brother-in-law Kanye West and a close friend of Blac, has also taken shots at Kylie in the past, making digs about the age difference between the 18-year-old and Tyga, 26.

The bad blood between Blac and Amber also runs between Khloe, who entered into a public spat with Amber after she passed judgment on Kylie and Tyga's romance.