LONDON (Reuters) – Britain’s Prince William and his wife Catherine are expecting a baby, destined to be the country’s future monarch, although the mother-to-be is in hospital with a type of very acute morning sickness that sometimes indicates twins. “Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting a baby,” the prince’s office said in a statement on Monday, adding that Queen Elizabeth and the royal family were delighted. …