North Korean leader Kim Jong-un has been seen with the ‘mystery lady’ for the second time, AFP reports.

The lady, believed to be in her late 20s or early 30s, was first seen with the young North Korean leader at a performance by the Moranbong band in Pyongyang. Her latest appearance was during Kim’s visit to a kindergarten. Many are suggesting that she might be Kim’s younger sister.

But South Korea’s Yonhap news agency reported that the woman is ‘highly likely’ to be Kim’s wife. “From the protocol point of view, such as this woman’s place and table settings, it is highly likely that she’s his wife and … he must actually be married,” a Seoul government official, who declined to be named, told Yonhap.

However, as so little is known of the young leader, even his real age, it is still unclear if he is married. According to AFP, North Korea’s first ladies are rarely photographed.

Cheong Seong-Chang of the South’s Sejong Institute said in a report that the ‘mystery lady’ at Kim’s side was part of the North’s ‘propaganda’ to “create the image of him as a stable leader.”