Seems like this started off as a manhua so there's no novel version unfortunately :(
If you can read Chinese though, you can find the raws for the first season here: https://rawdevart.com/comic/evil-lady-will-change/
It seems the original Chinese chapters are short. The English and Korean translations combine several chapters into one. The raws for the first season and current second season can be found here: https://toonkor.com/악녀는-변화한다
Urghh thanx, the wait persists then
Ya, unfortunately ^^;;
I googled it and it's adapted from a korean novel
The novel author's name is nunoiz
The novel link https://page.kakao.com/home?seriesId=50467381
I really just wanna see the sister and the old kingdom get a reality check real quick!