The reality star has been in the audience for her sibling almost every week, but having filed for divorce after just 72 days of marriage earlier this month, she's decided to keep a low profile and watch the show from home.
'She's not feeling up to attending tonight's taping,' an insider told Life & Style. 'Even though it's really important to her to be there for Rob, she's still so depressed and unhappy to deal with the cameras and attention.
'Kim's told friends she's just going to stay at home and vote as many times as she can. She believes Rob will make it to the final two - much better than she did when she was on the show.'
But if he makes it through to the final, 'Kim would definitely go to that to cheer him on,' added the source.