Tensions are operating substantial in the Kardashian clan in excess of Rob Kardashian's engagement to Blac Chyna. Sunday night's episode of "Retaining Up with the Kardashians" showed Kim, Kourtney and Khloe's reaction to the news -- right after they have been completely blindsided by his surprise proposal. The whole family members -- sans Rob -- were on vacation in Aspen when he popped the query, the women discovering out about it by means of social media. To say they weren't thrilled about it would be an understatement. "Rob is just a f---ing p---y," Khloe Kardashian exclaims as she go through an write-up about the engagement on her phone. "He proposed in front of her total family? So he is engaged to Blac Chyna and you will not even inform your sisters?!" "We wake up to all of these photos of my brother just getting engaged," Kim Kardashian explains in a confessional. "I'm just like, is this genuine, what's going on, how do we inform our mom? Everyone's calling us, asking if it's accurate and we just will not know. It helps make no sense and it is so hurtful." Khloe goes on to describe that she's just frustrated that he didn't allow her in on the news beforehand, especially contemplating she was so open with him about her partnership with ex Lamar Odom. "The f---ed up component is we had been talking to him all at dinner final night. Which is so f--ked up that he did that. My feelings are hurt that he isn't going to come to feel like he can talk to me about that," she tells her sisters. "He was so involved in me and Lamar. I uncover it weird, he acts like it really is two distinct lives. He isn't going to even give me a chance." Kourtney Kardashian is the only one who seems to be on her brother's side, calling out Kim after she says Rob is "a lunatic." "That is wonderful and that is specifically why he didn't tell you," Kourt tells her sis, "simply because you are a f---ing bitch." "My brother is the happiest I have observed him in a extended time," Kourtney explains in a confessional. "I hope every thing is genuine and sincere and that's all we can hope. It's not up to us, why result in any stress and add any drama? We must be happy for him." The episode ends with Khloe suggesting that a person else may be pulling strings behind the scene, casting doubt on Chyna's intentions with her brother. "Obtaining out on social media leaves a really poor taste in my mouth. Now that Rob has figured out the place his happy is, as an alternative of sharing that with his family members, he's pushing us much more away and he keeps carrying out issues to keep this divide amongst us," she says. "Is somebody in his ear telling him this data saying he should handle it? I can not deal with it, that is f---ed up." We'll see the fallout proceed next week, as Kris Jenner reacts to the news -- and Kim is heard saying, "he need to legitimately dislike our complete family members." Kim not too long ago opened up about the family's emotions about the engagement and pregnancy in an interview with GQ. in which it sounds like some of their attitudes have altered. "We're all on board," Kim tells the mag. "We definitely see that my brother is pleased and acquiring healthful, and whatever gets him to that area, you know, we're satisfied for him. Chyna's a sweet woman, and I consider we all have so many factors going on in our lives that we just want my brother to be satisfied. Has there been so several crazy things that happened? Yes. Is the entire scenario, you know, just...? I feel men and women want to really feel like we're all beefing and have this crazy battle, and we're actually not. I think the drama naturally follows us."