There’s a reason Rob Kardashian especially hates to see his sister, Khloe Kardashian, so grief-stricken over the fact that their family’s longtime reality television show Keeping Up with the Kardashians will see its last days in 2021. “Rob loves all of his sisters, but he has a special bond with Khloe and it breaks his heart that she’s taking this the hardest,” a KarJenner source EXCLUSIVELY reveals to HollywoodLife.