Yi's mother,
Seong Hye-rang, raised
Kim Jong Il's and her younger sister Hye-rim's son
Kim Jong-nam alongside Yi and Yi's sister
Nam-ok at a secluded villa outside of
Pyongyang in order to keep Jong-nam's parentage a secret from
Kim Il Sung.
Song Hye-rim is described as the former wife of Kim Jong Il, though it is unclear whether they were actually married. Yi went abroad to
Moscow for a university education, and then defected to South Korea in 1982 while studying at a language school in
Switzerland. His defection in 1982 had been kept secret due to his connections. He underwent plastic surgery and changed his name to conceal his identity. His identity was revealed when he had told newspapers he was financially supporting his aunt's defection who was in Moscow. ==Life in South Korea==