Kim Kardashian blast her brother Rob 'Quit spending mum's money!'

Things appear to be getting serious fast between Rob Kardashian and Blac Chyna!

And we're told in an attempt to keep his lady love happy, the reclusive reality has been splurging on his new woman - and his sister Kim Kardashian isn't happy about it!

Kim Kardashian has told Rob Kardashian to stop spending their fortune. Photo: Getty

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The klan isn't happy with how Rob is lavishing gifts on his new girlfriend Blac Chyna. Photo: Getty

We're told Kim, 35, is furious Rob's wasting the family fortune and she's forcing their sisters to put pressure on their mum kris Jenner to cut off their bro financially!

"The girls see this as war," a source tells HollywoodLife.com. "They're all pressuring Kris to lay down the law with Rob."

For more on this and to find out what Rob's been splashing his cash on, pick a copy of FAMOUS, out now.