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.