
a lot of people are saying rezef and raphael are related.
rezef and cayena are half-siblings right? because rezef is an illegitimate child because he isn't the empress' child. and cayena is the offspring of the empress and emperor.
but some are saying rezef and raphael are related because apparently, rezef's father is not the emperor but the duke which is raphael's father.
i am also confused with people saying that this is cayena's 3rd life. but i thought she read the novel and got reincarnated/transmigrated into it.
so... please help me out.

Not sure about Cayena's third life. It's explained a bit more about that scene in the novel like even though Gillian didn't do anything yet, its like her body remembers it and responded like that. Also, I feel that scene was handled better in the novel than in Manhwa. For Rezef and Raphael... Rezef is not the emperor's son. The empress had an affair with the duke and Rezef is their son. The emperor felt betrayed and kills the empress himself by poisoning him.
Rezef and Raphael share the common father while Rezef and Cayena shares the same mother. It's said she got her beauty from the empress so that's the reason Cayena and Rezef looks so similar

You are confused about how this is Cayena’s 3rd life because the translation posted here is not the most accurate. Cayena actually mentions in ch 1 that her life as a Korean is her 2nd life. For example, ch 1 posted here says “ So I really came back. The fact that I’m currently the villainess in a novel is pretty shocking. Especially because I was reincarnated into a villainess that caught my eye from my previous life.”
compared to a different group: “ To think that I’ve become Cayena Hill, the villainess of a novel. Was my life in the real world my second life? I can’t believe the reason I was so interested in the villainess Cayena’s life was because she was who I was in my past life.”
If you want the most accurate translation with fully translated/drawn sfx, I recommend reading at mangadex under the group “illiterate bitches”

WHY DID HE PICK HER UP LIKE THAT??!?!? THAT WAS SO UNBROTHERLY LIKE AND SWEET WHAT THE FUCKKKKKKKK

they not really family though, no one in the story sees them as a family cause of the blood. he does not see her as his sister either, he never was. and she never grows up with him, she comes from another world with a totally different childhood. she might as well be a stranger. so not really, there be no rumors XD
and besides, even if people will talk about them, do you really think this ML care and won't kill anyone that talk from the shadows? XDD
i really loved the artstyle and the way they set the mood to each scene