ABC News February 22, 2018

Kim Yo Jong, North Korean leader's sister, pregnant with 2nd child: Report

WATCH: Kim Yo Jong: Everything you need to know about Kim Jong Un's sister

Kim Yo Jong, the sister of North Korea’s supreme leader, is pregnant with a second child, according to South Korean media reports.

During her visit to South Korea as part of a high-level delegation at the beginning of the Pyeongchang Winter Olympics, Kim told the South’s officials about her pregnancy, South Korean local press Chosun Ilbo reported Wednesday.

Meanwhile, South Korean government is saving breath on this hearsay.

Who is Kim Yo Jong? Kim Jong Un's mysterious sister readies for her close-up at the Winter Olympics Kim Jong Un's sister shakes hands with South Korea's president at Olympics opening ceremony
AP
South Korean President Moon Jae-in, right, shakes hands with Kim Yo Jong, North Korean leader Kim Jong Un's sister, after receiving a letter at the presidential house in Seoul, South Korea, Saturday, Feb. 10, 2018.

“We cannot confirm anything,” South Korea’s Unification Ministry told ABC News Thursday.

There has been careful speculation on Kim’s pregnancy during her three-day visit from Feb. 9 to 11. Kim had a relatively protruding belly, despite her slender shape, and her careful movements led local media to guess she was pregnant.

"Even if she is pregnant, it does not have to do with the political successor of the communist state. And I am positive that Kim Jong Un already knows about her pregnancy," Koh Yu-hwan, professor of North Korean studies at Seoul-based Dongguk University, told ABC News.

Matthias Hangst/Getty Images
Kim Yo-Jong shakes hands with President of South Korea, Moon Jae-in during the Opening Ceremony of the PyeongChang 2018 Winter Olympic Games at PyeongChang Olympic Stadium on Feb. 9, 2018

Meanwhile, nothing is official. The North Korean regime never publicly announced whether Kim Yo Jong gave birth to her first child or even got married. South Korea's National Intelligence Service has said her first child was born around May 2015.

But under the premise that Kim Yo Jong is pregnant, there has been growing curiosity about the rogue regime leader's son-in-law. There have been many South Korean stories speculating on Kim Yo Jong's marriage and the spouse behind the veil.

South Korea's local press outlet Dailian reported the most likely possibility leans toward an elite who graduated from Kim Il Sung University with Kim Yo Jong, and is now a college professor teaching science in North Korea.