I saw in some comments that the FL become a queen for her brother but before she do that she told that to her younger brother about his plan, but the FL doesn't know that her younger brother doesn't receive any letters (the one who received the letter is her father and he doesn't give it to her younger brother) .and doesn't know how to read, write because no one teach him.
she married the king and then disposed of the crown prince which led to a rebellion. crown prince took over again with her brother’s help, and was executed as a traitor to the king. she’s kinda like the giving tree except her brother didn’t know she was making these sacrifices to make him heir + a hero. everything she did was out of love for dou （/TДT)/
Can someone explain to me the beginning? I didn’t understand what she did and for what. Why is she the Queen? Why did they kill her?