LONDON (Reuters) - The Duchess of Cambridge might have accidentally revealed the sex of her unborn child during a conversation with a well-wisher, hinting that the future monarch could be a girl. When presented with a white teddy bear on a trip to Grimsby, a woman in the crowd said Kate appeared to hint that she was expecting a daughter. "I distinctly heard Kate say: 'Thank you, I will take that for my d...'" Sandra Cook, who was standing next to the woman who presented Kate with the toy, was widely quoted as saying. "Then she stopped and corrected herself to say... 'for my baby'," Cook said. ...