The Kardashian sisters have had theirfair share of fights, but at the end of the day, they are there for each other through thick and thin.

Kim Kardashian tight-knit circle has proven exactly that, with a source close to the reality star telling E! News exclusively that Khloe Kardashian and Kourtney Kardashian have been the reality star's "support system" as she marks the end of her six-year marriage to Kanye West.