Khloe Kardashian is refusing to attend brother Rob's wedding.

Khloe, 32, fumed: "Why was he able to propose in front of her whole family but not us? I feel like Rob is deliberately excluding us from so many things and he almost likes this wedge being put between us all."

Khloe says Rob, 29, is "full of bulls**t" and will "come back crawling" if it all goes wrong, but is adamant she won't attend his nuptials if they go ahead.

Speaking on their reality TV show 'Keeping Up with the Kardashians', Khloe said: "I'm not going to his wedding if he has a wedding."

However, sister Kourtney, 38, tried to calm her down and said: "But how many weddings have we been to in this family and they don't mean s**t so let's all get over it!"

And it seems Rob's mum Kris Jenner is just as annoyed about the whole situation as her daughter.

She vented: "He asked her mum for her hand in marriage and he's never even mentioned it to us. I'm not going to call him, he should have called me. To hear Rob got engaged through social media is a bit disappointing to say the least."

Rob's romance with Blac has caused huge controversy within the family as she is the ex-fiancé of sister Kylie's on/off boyfriend Tyga.

During the episode, Tyga, 26, defended his former lover and mother of his child, by telling the family: "The best thing is to sit back and just let them be. Everything you're going through I've gone through worse with her. She's not a bad person."