The Duchess of Cambridge is holidaying on the Caribbean island of Mustique with her husband and family.
Kate is staying at a £19,000 a week villa while she recovers from the severe morning sickness which blighted the earlier days of her pregnancy and saw her briefly hospitalised.
A source told The Sun: "The Duke and Duchess have joined the Middletons for a winter break... a month ago such a journey would have been unthinkable for her, so this is a clear sign she has made a virtual recovery."
Perhaps Kate is hoping to gain a natural tan - for the mother-to-be is said to have recently cancelled her spray tanning appointments.
Pregnant women are not supposed to have spray tans in the first trimester, a source at St Tropez tan told the Daily Mail.
The 31-year-old had been spotted shopping in west London earlier last week, calling into Boots, Gaps and maternity store JoJo Maman Bébé.
She was dressed in typical off-duty gear - skinny pants, suede boots, ponytail - with one exception: a swingy tartan cape-like jacket from Zara, which cascaded over what appears to be a visibly pregnant tummy. Royal Bump Watch has officially begun.