With little fanfare, she exited Kensington Palace for a very hush-hush walk through Kensington Gardens with dog Lupo followed by a trip to the coffee chain!
"Her hair was done nicely and she had a scarf, lovely long coat and boots on ... she was wrapped up warm, so I couldn't see the bump," the observer adds.
It's unclear just how much she's showing at this stage, but don't expect a lot of splashy celebrity gossip magazine photo shoots or Instagram updates.
Anyway, as the security guard waited outside with Lupo, Prince William's wife went inside and placed her order herself: Her decaf drink, plus a cookie.
Thus armed with provisions, the expectant royal took Lupo's leash back from the security guard (the pooch is "so cute and well-behaved," the spy says), and carried on.
"She's a regular," a Starbucks staffer says of the Duchess.
"Kate was smiling," the observer continues. Sadly, no Kate Middleton photos were taken, but she "paid with a Starbucks card, which she swiped herself."
