This manga reminds me of another one, especially the meeting of the sisters and the ball, but I can't put my finger on the exact name of the manga.
It's this one. It's actually the same story:
https://www.mangago.zone/read-manga/the_evil_sorceress_plans_to_survive/
I think I'm forgetting something, so she's not their biological child right? If not, does that mean the duke got to the child of prophecy before the imperial family? I was also wondering how they took pictures back then because if they had to stand there while the artist was painting then can you imagine how awkward and painful it would be to stand still while sniffing her hair
I can't be the only one who zoomed in on the hairs that showed under the cloak to determine the hair color