Pippa Middleton with Kate Middleton at Wimbledon

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It has been reported that pregnant Kate Middleton has been worrying over Pippa Middleton's ever-blossoming celebrity status, proving that their sisterly bond is still at an all time high. 

The Duchess of Cambridge, whose wedding thrust maid of honour Pippa Middleton into a global limelight, has apparently voiced concerns that her growing celebrity status and new writing career will open the younger Middleton sister up to criticism. 

Despite having access to all the hottest events in town, Pippa is said to have been cutting back on her social appearances in line with her elder sister's advice. 

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PM has recently taken on many writing and editorial roles, including releasing her entertainment guide Celebrate and becoming a columnist for Waitrose magazine - sending sales soaring as she gives hints and tips for foodie feasts and occasions. 

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With Kate Middleton's due date growing ever closer and reports that Pippa Middleton has thrown the first ever Royal baby shower, we wonder if Pip will be spending less time on the social circuit and more time playing the adoring aunt…

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WATCH: PIPPA MIDDLETON AT HER BOOK LAUNCH INTERVIEW