The Keeping up with the Kardashians star admitted having a hit reality show was "a double-edged sword".
"We want to share these great times but when you want to have some private time you're not really allowed to ...
"I'm just glad I'm out here in Australia to get my mind off things."
Looking tired and withdrawn, the only awkward moment of the interview came when she was asked, "How hard did you work to keep your marriage together?"
"I think when you know so deep in your heart that you just have to listen to your intuiton and follow your heart there's no right or wrong thing to do," she blathered as a reply.
"I'm not ready to get into the details of it. What upsets me the most is there have been so many rumours ... so much of it is not true."
Kardashian is due to make several public appearances in Sydney today before flying to Melbourne.
Earlier, an exhausted Kardashian finally answered questions about her divorce from Humphries, saying it was tough knowing people think her marriage was a publicity stunt.
"It's sad that I even have to defend that but I guess that's what you get when you live your life on a reality show," the visibly upset star said in one of her first interviews since filing for divorce after just 72 days of marriage.
"Khloe had to go through the same thing when she got married after knowing someone a couple of days,'' she said of her younger sister, who married American basketball star Lamar Odom after a short courtship.
"You don't like reading those types of things ..."
Kardashian, 31, filed for divorce from Humphries on Monday, citing irreconcilable differences.
The couple married in a lavish, star-studded, made-for-TV wedding just 10 weeks ago.
Kim and Khloe Kardashian were greeted by a crush of waiting media and fans when they arrived in Sydney on Wednesday morning to promote their new line of handbags.
Kim, dressed in a short dress and simple blazer, spoke to AAP from her Sydney hotel room as Khloe sat quietly by her side.
Appearing tired and distracted, Kim spoke softly as she answered questions about her marriage break-up.
When asked if she was glad to be away from the LA paparazzi at the moment, she said it was good being with her sister in Australia.
"It's tough, you know, but I'm just kind of diving into being with my family and I made this commitment to come out here for the line and I just want to honour my commitments."
In a message to fans on her website, Kardashian compared her relationship with Humphries to being on a fast rollercoaster she couldn't get off.
"I got caught up with the hoopla and the filming of the TV show that when I probably should have ended my relationship I didn't know how to and didn't want to disappoint a lot of people."
The sisters will appear at two Sydney stores on Thursday, before Kim flies to Melbourne later this week.
TV3 reporter Samantha Hayes was the only New Zealand journalist allowed on the red carpet in Sydney to ask the Kardashian sisters questions, but was banned from mentioning the divorce.
Instead, Hayes asked the pair if they fought while making their latest range of handbags.
- Herald online with AAP
