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Bette Midler jokingly mocks Rob Kardashian and Kylie Jenner

Bette Midler jokingly mocks Rob Kardashian and Kylie Jenner

Bette Midler has mocked Rob Kardashian and Kylie Jenner while pointing out they could end up sharing a stepchild.

The 70-year-old legendary performer has taken a swipe at the Kardashian/Jenner family again after finding out that Rob and Blac Chyna are engaged, which means if they get married he will become step-father to Blac's ex Tyga's son King Cairo while his half-sister Kylie, who is now dating the 'Rack City' rapper, would also become step-mother to the three-year-old if they got hitched.

Taking to her Twitter account on Thursday night (14.04.16), Bette quipped: "Rob Kardashian's engaged to the MOTHER of the child of Kylie Jenner's boyfriend? They'll share a stepchild? Somebody send me a chart!"

Bette's tweet follows her remarks a few weeks back when Kim Kardashian West, 35, posted a naked selfie.

The pair shared several fiery exchanges including Kim saying she was a "fake friend", which Bette hilariously responded to by saying the 'Keeping Up With The Kardashian' beauty can't "take a joke".

Kim previously tweeted: "hey @BetteMidler I really didn't want to bring up how you sent me a gift awhile back trying to be a fake friend then come at me #dejavu (sic)."

And Bette replied: "I never tried to fake friend you. Looks like anyone can take a selfie but not everyone can take a joke... (sic)