The 'Keeping Up With The Kardashians' star and her sister Kim Kardashian West criticised their brother for failing to stay in touch with his fiancée Blac Chyna.
Khloe said: ''He has not spoke to her in days. How dare you leave a pregnant woman? I don't give a f**k. I don't care if he is our brother, it is crazy how he is acting. It's f***ed up. If this was any man that we were with we would be pissed.''
Whilst Kim added: ''Rob is going to be a dad and has a family to answer to and now more than ever Rob can't handle things the way he once did. He has to deal with his problems not just run away and hide from them.''
And the 32-year-old television went on to urge Rob, 29, to ''communicate more''.
Speaking on the new episode of the family's E! reality show, Khloe added: ''You need to communicate more so if you are going through something we can help you ... Rob feels we are all dramatic and judgmental then we have to take heed to that. What's done is done and I am happy that Rob can now talk to us about things.''
Meanwhile, Rob previously criticised his family for not ''welcoming'' Chyna.
His mother Kris Jenner told him: ''I get that you're in this new relationship, that's amazing for you, but it doesn't mean that you can't still be close to all of us, that's how life works.''
Whilst Rob replied: ''No I know but y'all aren't like that welcoming of this relationship so you can't expect me to just be like, 'Oh let's all hang out and everything's cool and fine!' It's not that easy.''
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