Give me as much spoilers as you can, I wanna be flooded with itლ(´ڡ`ლ)
Spoiler
According to the comments the reason why the Ml killed the Fl and her family is because the Fl's father is planning a rebellion against the emperor. The brother was aware of the scheme thats why he stayed quiet and evaded the Fl's question about the imperial palace. The Fl is actually a royal of another kingdom. The rebellion's purpose is to crown the Fl as the empress/crown princess and make his son (Fl's brother) the emperor. The reason why the emperor killed Tori is because according to the comments she betray the Ml. She's a spy (maybe Tori is involve in the Fl's father's scheme). So what the emperor did was reasonable and its a good thing that the Fl is starting to be supicious of her father. As for Liche she knows that the Fl is a royalty. Liche has a crush on Fl's brother but shes jealous because in the future his crush will marry the Fl.
Thats all I know I hope it helps(⌒▽⌒)
I knew it! I almost hit myself cause I thought my thoughts is ridiculous. I notice that the brother and sister relationship is kinda off cause whenever they have sweet conversation the background is shinning, glitterring, flowering which can be seen in some love story between ML and FL! LMFAO! like wtf! its just a convo between sis and bro why the heck did they put that kind of background. It such a relief that my ridiculous thoughts is answered.
Aww now they can live an ordinary life and just love eachother unconditionally, ahh how much I love this bittersweet feeling ╥﹏╥