‘Stop this betrayal!’

e caused chaos within the Kardashian H clan last week after breaking the news he was dating model Blac Chyna – the arch nemesis of his half-sister Kylie Jenner and the former fiancée of her boyfriend Tyga. Now the infamous family have accused Rob of betraying them and begged him to stop.

Rob even went as far as to taunt his family on Instagram by suggesting Blac – who has son King Cairo, three, with Tyga – could be pregnant with his child. The caption read: “Blac Chyna probably out shopping rite now as she plan to give birth to the only next generation of the Kardashian name [sic].”

Following the scandal, reclusive Rob, 28 – who’s been battling depression and a reported 7st weight gain over the past couple of years – was seen driving with Blac Chyna, 27, to momager Kris Jenner’s mansion for crisis talks.

A source says: “Kris demanded a face-to-face with Rob. She told Rob that if he wants to be with Blac Chyna, he should stop using her as a weapon against their family and try to sort things out with his sisters, who are up in arms. Blac Chyna told Kris that she doesn’t want to upset their family and is prepared to make up with the girls. Rob doesn’t know what his next move is at the moment – he’s trying to bury his head in the sand. Kris has told Rob to stop this betrayal and sort out this mess.”

Rob has been living at sister Khloe’s home for the past few years, but last week reports surfaced she’d kicked him out in protest after she found Blac Chyna and Rob together at her house, and that he’d moved in with his new girlfriend.

An insider says: “Kim and Khloe have told Rob that if he doesn’t dump her, they’ll no longer call him their brother. The girls are all incredibly protective of Kylie as she’s the baby of the family and feel Rob has gone too far.”

Blac Chyna has a notoriously fiery relationship with Tyga and the pair have had a string of social media spats, which Kylie, 18, has been dragged into. And not only has she repeatedly slammed the Kardashian/jenner clan, she’s also best pals with Kim’s husband Kanye’s ex Amber Rose.

A source says: “Kim just feels this is building up to something very bad. It seems to be the ultimate revenge for Amber and Blac as they’ve loathed Kim and Kylie for ages. Kim’s told Rob that the relationship is unacceptable on all levels.”