Is Duchess Kate really expecting second royal baby?

Rumors that Duchess Kate is expecting a royal baby looked to be over almost as they started Sunday, as she sipped wine and enjoyed a powerboat ride during an overseas tour.

British newspapers speculated that young Prince George might soon have a sibling after Prince William made a comment to well-wisher Cynthia Read during a public walkabout in Dunedin, New Zealand, Saturday.

Prince William and Duchess Kate visit a winery in Queenstown, New Zealand.

Read handed Prince William a shawl for 8-month-old Prince George, prompting William to reportedly reply: "You might have to make another one soon."

That sent the royal rumor mill into overdrive, but on Sunday Kate and William went on a tour of a winery where she enjoyed a glass of pinot noir in front of the cameras.

In the adventure sport city of Queenstown, the couple went on a powerboat river ride.

William and Kate – and baby George – have only two days left in New Zealand before the royal tour rolls onwards to Australia.

Alastair Jamieson contributed to this report from London.