The mc is part of the problem and is low-key a hypocrite.Anyway, the father belongs in the...

Wait, I don't think she's an illegitimate child though? She's the child of the queen after all, they already said that before, and for the older sister who's just gross, well siblings can be different, that's normal. And she was obviously jealous of the love that Mc receives, it is true that the older sister isn't as loved as her, and maybe she had different frequentations, also some people are just bad no matter the upbringing, like psychopaths. They are just born evil.

I mean they are born like that but of course their choices are what differentiate them, there are many who do good deeds no matter what IRL, but since here is a webtoon, well.

I thought she was a illegitimate child cause I think in one chapter we see a black haired women in the kings memory sweating just like she got out of labor.But I could be wrong since he hasn’t said anything to tell us who that was.

Oh yes, that part, I believe the people there called her the queen, I think the second queen maybe?? Well, still, I wonder if the whole country also thinks that she's a bad omen? Do you think that would be a possible direction for the story?

Pretty sure that was the queen consort, so she's a legitimate child. There's the empress and then consorts. All would be legal wives of the king so none of the children born from these wives would be illegitimate. Pleta seems to be the only child of the queen consort before she passed. The rest are the empress' bloodline. Only reason I'm questioning it is because the translation said first empress so it would be that Pleta's mother was the original empress and the MC's mom was queen consort until the first empress passed.