Khloé Kardashian says Rob Kardashian "burned his last bridge" when he bought Blac Chyna back to her house.

She fumed on the season 12 premiere of the family's E! reality show: "Do you want to hear the craziest story? Rob was asking what time I would be home and I got home 30 minutes than the time that I told him I was coming home so I walked in on him with Blac Chyna at my house.

"There’s alcohol everywhere. He’s having the time of his life. Don’t you dare make me feel uncomfortable in my own home ... I don’t really care who Rob dates but having Chyna over at my house without my knowledge is disrespectful. Why can’t he be honest with me and communicate because Robert knows Chyna’s Tyga’s ex-girlfriend and I just don’t want that drama in my personal space ... I told him, I said you’ve burned your last bridge."

And the 31-year-old television personality went on to confirm Rob, 29, had moved out of her house.

Speaking with her family later in the show, she told them: "Robert has left the premises at my house and moved in with, I guess, his girlfriend Blac Chyna. I don’t know where they stay, I don’t know what they do. I don’t know anything."

Sister Kylie Jenner then revealed he was trying to buy the house next door to his 27-year-old wife-to-be and momager Kris Jenner came under fire for helping him to fund a deposit on the property.

Kris told them: "He can’t find his way now. He’s lost."

But Khloé hit back: "You better not be paying for his down payment. He doesn’t deserve it."