The 38-year-old author – who
is the younger sister of Catherine, Duchess of Cambridge – was among the guests
at the Platinum Party at the Palace celebratory concert and she arrived for
Saturday night’s event at Buckingham Palace in London wearing a green dress
with a V-neck that appeared to show off a growing baby bump.
Pippa – who was pictured with
her hands linked together above her tummy, accentuating her shape – already has a son Arthur, three, and daughter Grace, 14 months, with husband James Matthews.
She was in attendance at the
concert with her sister, brother-in-law Prince William and her niece and
nephew, Prince George, eight, and seven-year-old Princess Charlotte.
A source told the New York
Post newspaper’s Page Six column that the couple are “so happy”
together and Pippa is a “natural mama”.
While the brunette beauty
confirmed her first pregnancy at the time, she never officially announced the
happy news when she was expecting her second child, though Grace’s birth was