I like to hc ancient Silla become Goryeo and Joseon and she's the Korea twins mom. Because she was from the south herself originally, she favored SK over NK which caused some resentment....
just in general SK was the golden child because he's more academically intelligent and cheerful but NK has more hands-on intelligence and has better leadership qualities (example: SK would not know how to bargain for deals or make stuff from scratch as well as NK can)
















