It comes just one day after it was revealed Peter Phillips, son of Princess Anne, had appeared in two adverts for Jersey Cattle Fresh Milk in China. Defendant in the case was another grandson of the British Queen Elizabeth II - 42-year-old Peter Phillips, the name of which 15 in the list of succession.
Although Peter hasn't confirmed that he was paid for the adverts, reports suggest that the deal could have been worth tens of thousands of pounds. The stately home did not give permission for this.
Lady Kitty Spencer appeared in London to promote Satine Milk, a Chinese brand, in June a year ago and though no one realised at the time, it kicked off a trend of almost-royals cashing in on their connections for commercial work.
In the advertisement Lady Kitty sipped tea while a Chinese woman poured milk from a carton.
He said: 'If it's okay to be on the cover [of a magazine] as Kitty Spencer has been, as a successful model for the last five years, flogging Dolce & Gabbana or something - what's wrong with flogging some Chinese milk company?
It goes on to show an aerial view of green hills, with a caption in Chinese which reportedly translates as, "The royal estate of Britain - Jersey Island", before moving on to a close-up shot of a small herd of cows munching on grass. She told assembled Chinese journalists: "The day of the royal family usually begins with a cup of milk or a cup of tea". Weirdest royal news of the year so far. Jersey milk is considered to be the finest and most special from the United Kingdom'.
It's unclear if and how much Peter was paid for his work, but Kitty was clear on her Instagram that her work with Satine Milk was a paid partnership with the British Museum, where the event was hosted.
The daughter of Earl Spencer and niece of the late Diana, Princess of Wales, Spencer is better known for her modelling than her royal connections.
She continued: "A fascinating morning learning and speaking at the Satine x British Museum Limited Edition Launch Event".
After Bev insisted that she wishes the couple "all the best", Andrew added: I do too.
The British Museum received a fee for hosting the event, which it said was "commercially sensitive".
A spokesperson for the British Museum said: 'The British Museum started its brand licensing programme back in 2016 and has an worldwide programme, with select licensee partners in China, the UK, Europe and North America.
'The press release details the collaboration on this particular product and the role of the British Museum, whereby the design of the packaging for a specific product was inspired by objects in the British Museum's collection'.