A Mystery About a Mistress in North Korea By JAMES BROOKE Published: August 27, 2004 EOUL, South Korea, Aug. 26 - South Korean government officials are struggling to confirm persistent reports from North Korea of the recent death of its leader Kim Jong Il's favorite mistress, a former dancer who was elevated in the Communist state's pantheon to the status of "respected mother." The woman, Koh Young Hee, a Japanese-born Korean dancer, was treated in Paris last spring for advanced cancer. Over the summer, Ms. Koh, the 51-year-old mother of two of Mr. Kim's sons, was flown back to the...