Kim said the parenting decision came as a result of her desire to explore her sexuality with her boyfriend, a family friend.
"When I did want to have sex the first time I was almost 15," Kim said, adding her liberal mom was open to discussion about the topic, and even got her on birth control.
The revelation came as a surprise to the veteran journalist Oprah, who said, "Wow," before moving onto the next question.
Part two of Oprah’s Next Chapter with Kim airs Sunday at 8/7c on OWN.
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