“I really don’t have the words to describe, my love, gratitude for your generosity and kindness. Xx I am at your service. Just marry me.”

This is believed to be a reference to a trip Eugenie took with her now-husband, Jack Brooksbank.

While many are now seeing Sarah in a new light, one palace aide made a telling five-word remark about the former Duchess several years ago.

The Independent reported that in a 1995 interview, Lord Charteris – who retired in 1977 after five years as private secretary to the late Queen – described Sarah as “a vulgarian… vulgar, vulgar vulgar”.

This suggests that the revelation of these new emails to Epstein and the kinds of things Sarah would say may not come as a surprise to certain Palace staff.

Sarah has not commented on the emails she sent to Epstein that have been released in the latest Epstein files.

It is believed she is continuing to keep a low profile, which she has been doing since September when another email she sent to the late convicted paedophile – this time in 2011 – was made public.

A source close to Eugenie and Beatrice told the Daily Mail this week: “They are aghast at what they have read. They are mortified by the emails their mother has sent to Epstein. It is so embarrassing for them.”