The 'Keeping Up with the Kardashians' star, who is married to rapper Kanye West, had decided to take a vacation to Thailand with family and when 27-year-old Rob didn't show up at the airport, they continued without him.
While sister Khloe Kardashian was worried about him, Kim was indifferent to the situation, reported Us magazine.
"We've all been here to offer him help and he won't take it, so I don't have sympathy.
On the other hand, Khloe defended him saying, "Rob has deeper issues than just weight. Rob was very close to Lamar and very attached to him and I think Rob has taken a very big hit with my divorce. I feel responsible for a lot of Rob's issues and I feel it's my job to lift him back up."
Khloe married basketball player Lamar Odom in 2009 but they divorced later.
