Pregnant Kate Middleton gets style advice from sister Pippa
Pippa Middleton has been helping Kate Middleton with her pregnancy wardrobe
Kate Middleton visited the National Portrait Gallery in a loose-fitting dress
Kate Middleton enjoys walking pet dog Lupo
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Kate Middleton has made only two outings since announcing her pregnancy.
She enjoyed a performance of Cirque du Soleil's Kooza show and also visited London's National Portrait Gallery wearing a burgundy dress from Whistles.
At just over 13 weeks pregnant, the Duchess of Cambridge, 31, is at that awkward stage where she's started to develop a small bump but isn't big enough for maternity wear.
So she's been relying on sister Pippa, 29, to help - they've been sifting through Kate's existing wardrobe to choose outfits that flatter her growing bump and have enough gape to last her for a few more months.
A source says: 'Kate doesn't want to spend money on maternity clothes if she can help it, but it's unlikely she'll have enough items suitable as her bump continues to grow.
'It's become a real bonding thing for her and Pippa.'
Read more about Kate and Pippa Middleton in Now magazine dated 21 January 2013 - out now!