Duchess of Cambridge spotted ‘pretending to be a monster’

Britain’s Duchess of Cambridge was spotted pretending to be ”a monster”.

The brunette beauty, 33, was reportedly seen ”flailing her arms” and running around as she played with her 22-month-old son Prince George in London’s Holland Park over the weekend.

The pretty gardens lie close to their Kensington Palace residence and according to onlookers the Duchess appeared full of energy a month after giving birth to her second child Princess Charlotte with her husband Prince William.

A source said: ”They both looked really well.

”It looked like she was pretending to be a monster, flailing her arms about and chasing him.

”She was play-acting just like all mums do and he was running around loving it – he looked very happy.

”He looked like such a happy lad, being chased by his mom and enjoying the swings, slides, roundabouts – they were going on everything. They looked just like any other mum and toddler.”

The duo were also said to be sporting ”matching” outfits.

The source added to PEOPLE: ”They had matching waxed-green coats on and dark jeans with boots. They both looked matching!”