It's a girl! Did Kate Middleton let slip sex of her baby?

A ROYAL slip of the tongue sent tabloids into a frenzy today as the Duchess of Cambridge appeared to reveal she is expecting a baby girl.

When the Duchess was handed a white teddy bear by a member of the public in Grimsby yesterday, she said: "Thank you, I will take that for my d… for my baby."

The 31-year-old has previously insisted she doesn't know the sex of her baby who will be third in line to the throne.

The source of the Royal scoop was Sandra Cook, 67, who was standing next to the woman who handed Middleton the bear. She told The Sun that the Duchess had clearly started to say the 'd' word, before realising she was letting the cat out of the bag.

"When she [Middleton] shook hands with me I said, 'You nearly slipped up there, you were going to say daughter, weren't you?" Cook said. "She smiled and said, 'What do you mean? We don't know yet'.

"I teased her and said, 'Oh I think you do' — to which, still smiling, she replied, 'We're not telling.'"

Cook, who waited two hours to see the Duchess yesterday, said "I'm certain it's a girl. She wouldn't have said the D-word otherwise."

The papers agree. The "famously discreet" Duchess "may have dropped her guard a little", says the Daily Mail. The "merest slip of the tongue" may have given away the sex of her baby, says the Daily Telegraph.

During her visit to Grimsby the Duchess also revealed her baby – due in July – has been "kicking". She admitted to a craving for cupcakes during a visit to a cooking class at a local school and told a well wisher who was looking forward to her becoming Queen: "You might be waiting for a long time."

Fashion watchers noted that Middleton's baby bump was covered by her "favourite" Hobbs Celeste coat and a "pretty" dress from Great Plains. ·