LADY IN GRAY: Fresh off the Diamond Jubilee circuit, the Duke and Duchess of Cambridge spent their weekend socializing — this time with the other side of Prince William’s family. The couple — and Prince Harry — attended the marriage of Emily McCorquodale, one of Princess Diana’s nieces, in Lincolnshire, England, on Saturday. Kate wore a Katherine Hooker light gray coat over a silk dress by Jenny Packham. She also wore the nude patent leather L.K. Bennett heels that are quickly becoming her trademark. McCorquodale, a daughter of Lady Sarah McCorquodale, Princess Diana’s elder sister, married James Hutt at the bride’s family’s home near Stoke Rochford.