"I am the only one that stood by him and defended him and wanted the best for him," Khloe shared, explaining why she's frustrated at Rob for essentially cutting ties with her after striking up his relationship with Blac Chyna.
The ongoing ill will between the once-close siblings isn't anything new. On the KUWTK season premiere, Khloe revealed to Scott Disick that she first found out about Rob's new relationship when she came home -- when Rob was living with her -- and found him and Blac Chyna together.
Now that he's moved out of her place -- and hasn't been speaking with her -- the 31-year-old reality star is livid that everyone else in the family seems to be on Rob's side.
"I would have such deep fights in my family because I was 'enabling' Rob by letting him live with me," Khloe vented. "The one person who yelled at me the most [was] my mom. Now she's helping Rob? I just find it mind-blowing."
As Kris is beginning to help Rob move into his new home Khloe calls up and adamantly refuses to help or to allow her personal assistants to help in any way.
"My assistants… will not help you with one thing in regards to Rob's move," she told her mom firmly over the phone. "My people are busy. We have other jobs over here. Rob's not inconveniencing my life. He's done that enough, for years."
"He hasn't called to check on me or to say hi or 'I miss you,'" Khloe said, opening up to her friend, Malika Haqq, about Rob, whom she said used to be her "best friend." "He's lived with me for how many years and he's just okay just completely leaving and not saying a thing to me? That hurts my feelings."
"That doesn’t mean he doesn't think about you," Malika replied. "Why don't you tell him he's hurting your feelings?... You guys could be thinking the exact same thing about each other."
Despite the apparent animosity, after Rob moved into his new home, Khloe felt like extending an olive branch in an effort to make amends, and decided to drive over and check out his new house.
However, when she arrived, Rob wasn't home, putting the kibosh on the reconciliation plans. Looks like fans will have to wait to see how the formerly friendly siblings bury the hatchet. Keeping Up With the Kardashians airs Sundays at 9 p.m. ET/PT on E!