Kate Middleton has taken her three children to the Hurlingham Club this summer
The highly exclusive club has long been a favourite hangout of the Duchess
An insider said the Cambridges' behave 'just like any normal family' while there
The family 'pile in' for lunch after George and Charlotte's tennis lessons
By STEPHANIE LINNING FOR MAILONLINE
PUBLISHED: 10:18 BST, 16 August 2019 |UPDATED: 13:16 BST, 16 August 2019
Parents everywhere are trying to keep their children busy during the school holidays, and it appears Kate Middleton is no exception.
The Duchess of Cambridge...