Kim Kardashian and Kanye West
Kim Kardashian and Kanye West.Instagram/Screenshot

Kim Kardashian has finally opened up about her alleged fight with brother Rob Kardashian that prompted him to jet out of Paris ahead of his sister's big day.

During an appearance on Tuesday's "Watch What Happened Live," Kim said that her brother left her a long email detailing the reasons for bailing on the wedding.

"He sent me a long email the morning of, that he was going to leave. There was no fight," Kim told host Andy Cohen, reported Us Weekly.

"I just thought, 'You know what, this is my day, I'm not even going to worry about it,'" continued Kim. "I totally understand that he wouldn't want to see a lot of people if he was feeling uncomfortable and you can only pray and wish that someone would not miss out on more memories in life, because life is about memories."

The "Keeping Up With the Kardashians" star added that she gets frustrated that Rob doesn't do enough to deal with his problems, but insisted that they are as close as ever.

Kim is all about tough love, and even though she has drawn flak for being insensitive to Rob's problem, Kim insists that she has reached out to her brother and tried to help him sort out his issues.

"I try to encourage him," she said. "And once you don't make that change for so long, and it's not happening, I get frustrated. My patience runs out,"

The recent episodes of "Keeping Up With the Kardashians" have been touching on the problems faced by Rob, who recently missed out on the family's vacation to Thailand. Although it wasn't revealed why he flaked out on the trip, rumour has it that Rob wasn't comfortable with the cameras following every move.

It was earlier reported that Rob decided to skip Kim's wedding because she kept criticising his weight gain, and that she felt he would ruin her "perfect wedding." Reportedly, this led this to Rob calling out Kim and her husband Kanye West for being superficial, and also for flaunting their wealth.

"Rob said he was sickened by Kim and Kanye's display of wealth and clothes and beauty and called it 'superficial bullsh*t' but Kim was pissed that Rob hadn't made an effort to drop any weight over the past few months. Rob basically thinks Kim cares about him only for his appearance and he said he'd 'make life easier' for her and just leave," a source told X17.

"He just doesn't seem to feel comfortable or happy around his family at all. They're all wrapped up in the same pretty world and he just doesn't fit in."