SEOUL (Reuters) - North Korean leader Kim Jong-il has taken his former secretary as his new wife, South Korea's Yonhap news agency reported on Sunday, citing sources familiar with the country. His wife Ko Yong-hi, the mother of two of Kim's three sons, died of breast cancer in August 2004, the agency said. "I heard Kim has been living together with a woman named Kim Ok, who was his secretary, since Ko Yong-hi died two years ago," Yonhap quoted a South Korean government source as saying.