The couple decided to part ways after 22 years of marriage, reported Ace Showbiz.
"There's no negative, bad blood. (Bruce has) been in my life since I was 2 years old and that will never change, and same obviously with my mom... Same with my sisters, there's no bad blood.
"Even between my mom and Bruce there's no negative, bad blood... I don't think they can be in a happier place right now," he said.
Rob, 26, also talks about his sister Khloe Kardashian and her husband Lamar Odom, who are said having problems in their marriage and said, "Honestly, I support both parties, Lamar, (is) my brother but Khloe is also my sister... (Khloe's) very happy and just going in the right direction.