The usually harmonious sisters Paris and Nicky Hilton are squabbling bitterly over Nicky’s decision to be a bridesmaid at Nicole Richie’s wedding. Paris still hates her Simple Life co-star, Nicole, reputedly for screening the infamous Paris sex-tape at a gathering of their mutual friends. But against her sister’s pleadings for her to drop out, Nicky will be in the bridal party when Nicole weds Adam Goldstein next month.