After her parents divorced, her father, Anthony Cox, remarried. In 1971, her father abducted the then 8-year-old Kyoko and followed her new stepmother in a cult called The Walk. Cox left the group with Kyoko in 1977 and they became fundamentalist Christians. After leaving the cult, as a part of their newfound Christian faith, they helped produce a film documentary exposing the cult. Continuing to live an underground existence, Kyoko was given the new name Rosemary.
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Was involved in a custody battle between her parents from 1969 to 1972.
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Mother of two children.
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Reunited with Yoko Ono and met her half-brother, Sean Lennon, for the first time. [1997]