WATCH: Rob Kardashian Calls Out His Family for Not ‘Welcoming’ Blac Chyna

Rob Kardashian doesn’t think his family was very welcoming of Blac Chyna when he first revealed that he was dating the ex-girlfriend of his younger sister’s current boyfriend. (Hmm, we wonder why?)

In a new sneak peek at an upcoming episode of Keeping Up with the Kardashians, Rob calls out his family and explains why his relationship with Khloé Kardashian has been on the rocks since dating Chyna. As Rob puts it to mom Kris Jenner, his older siblings haven’t been the nicest towards his pregnant fiancée.

“Y’all aren’t, like, that welcoming of this relationship, so you can’t just expect me to be like, ‘Oh, let’s all hang out. Everything’s cool and fine,'” Rob says . “It’s not that easy.”

Kris, siding with Khloé, reasons that Rob should probably give Khloé a break. Explaining that his sister has been going through a tough time with estranged husband Lamar Odom, Kris says that Khloé having her brother out of her life is probably the last thing she needs.

“I want you and Khloé to be OK and happy and connected. She’s your sister, you know?” Kris tells her son during a heart-to-heart (over salads — natch). “She had a hard year and went through a bad time with all the Lamar stuff, still. And she couldn’t need her family more now, and that includes you.”

As previously reported, Rob moved out of Khloé’s home over an alleged disagreement over Chyna. Since then, Rob has been staying with his girlfriend in a mansion Kris had bought for the couple.

Find out what Rob plans to do — above!