
No jue is supposed to be the crown prince aka the empress's son but the 4th Prince's mom switched him with a girl aka the FL sister so that she can make her son the crown prince in another word the FL is supposed to have a younger sister not a younger brother(jue) and the empress is supposed to have a son not a daughter.
Hope u can understand:)

Man, that’s some intense drama there. At first impression the princess seemed like a jerk, but when she rejected the manipulative (now one-legged) lady, I remembered that she didn’t completely hate the siblings protecting the maid. She just thought they were interesting. She gives off that spoiled naive princess vibe, so I definitely see some room for growth there. She seems to have taken a liking to both FL & Jue now. In light of this character development, I’m ok with her being the true sister. ╮( ̄▽ ̄)╭
I dont understand....does it mean jue is suppossed to be 8th prince and 8th prince suppossed to be mc brother???! So it mean 8th prince is not prince but jue is???