The Manny of now North Korean dictator Kim Jong-un saw it all in the palaces. He was the man-servant of the North Korean royal family (before he defected to Japan): and 
he saw little Kim Jong-un growing up to be an evil Rage-a-Holic just like his dictator father.
As a boy, Kim Jong-un was a gamer (Mario, boardgames, and basketball) and a heavy drinker. Downing the best in Russian vodka as a teen. Kim Jong-un was sickened and disgusted by the way his father cheated in the marriage, by molesting a brigade of girls which were kept in the palaces.
Kim Jong-un’s dad attempted to transform Un, to be just like him; but Un wanted little to do with his dad’s “Pleasure Brigade” of girls. Eventually Un’s father and his Manny too, began to gossip that Kim Jong-Un was Gay. In reality, Un just didn’t like how his uncle was treating the girls in the “Pleasure Brigade;” in fact, when Un came to power later, he had that uncle executed.
Kim Jong-un eventually dated two different singers; the one he married had her rival executed by firing squad, something about a porno which the paramour made (with Un?) and got caught selling. And it was just family values after that.
Kim Jong-un has a sister named Kim Yo-jong, and it is speculated that she is the propaganda mastermind behind his cult of personality. They became close while studying in Switzerland, and vacationing together. Some could speculate that they are like an ancient Egyptian dynasty, or other royal houses which liked to keep it all in the family through incest (that way they can keep their supposedly divine bloodline pure, and not let in outsiders).
Whatever the nature of their relationship, Un promoted his sister Kim Yo-jong as a leading member of the DPRK’s Propaganda and Agitation Department, as well as having her placed into the Politburo. She is extremely close to her dictator brother, and she got pregnant, and wears a ring, but no-one outside their circle seems to know who the lucky-man is. Well, what is known is that after her brother Kim Jong-un gobbled down too many Big Macs with cheese, and developed debilitating health problems as a result, his sister Kim Yo-jong held onto power on his behalf, until he was able to return to ruling over the North, so maybe Un just keeps her around because he trusts her.
Sources:
http://www.koreatimes.co.kr/www/nation/2018/02/103_243936.html
http://english.chosun.com/site/data/html_dir/2015/04/30/2015043001119.html
http://english.yonhapnews.co.kr/northkorea/2015/01/02/97/0401000000AEN20150102006900315F.html
http://www.ibtimes.com/has-kim-yo-jong-taken-over-kim-jong-un-sister-assumes-north-korea-state-duties-while-1698550
http://english.dailynk.com/english/read.php?num=13352&cataId=nk01500
http://english.alarabiya.net/en/variety/2014/02/23/Kim-John-Un-s-childhood-of-Big-Macs-and-pleasure-girls-revealed.html
http://www.dailymail.co.uk/news/article-2565558/My-playmate-monster-A-tyrant-nursery-Vodka-binges-14-Big-Macs-brigade-pleasure-girls-The-man-saw-Kim-Jong-Un-rock-star-boyhood-blood-soaked-dictatorship-tell-story.html
https://www.telegraph.co.uk/news/worldnews/asia/northkorea/10272953/Kim-Jong-uns-ex-lover-executed-by-firing-squad.html
https://www.telegraph.co.uk/news/worldnews/asia/northkorea/10398511/Kim-Jong-un-torn-between-two-women-before-he-married.html
