Kim Young-sook

Kim Young-sook was the second wife of Kim Jong Il. She was the daughter of a high-ranking military official, and was a switchboard operator in North Hamgyong Province before moving to Pyongyang. Kim Jong Il's father, Kim [Il Sung], handpicked her to marry his son. The two had been estranged for some years before his death. Kim Young-sook had two daughters from this marriage, Kim Sol-song and Kim Chun-song.
Song Hye-rang, the sister of Kim Jong Il's first mistress Song Hye-rim, mentioned that she is "insignificant to Kim Jong Il, apart from being a legitimate wife in front of Kim Il Sung. She did not even have an identity card in North Korea" as noted in her memoir Rattan house.