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Raph - father: Duke mother: Duchess
Rezef- father: Duke mother: empress
Cayena- father: emperor mother : empress
The empress cheated on the emperor with the Duke. This would hurt the emperor's pride hence he decided to spread the rumour that rezef's mother is another woman.
One of the main reasons that the emperor dislikes cayena is cause she looks like empress
Rezef is not the emperor's son.
Rezef and cayen have the same mother (empress)
Rezef and raph have the same father (duke)
Empress and Duke(Raph's dad) had an affair resulting to Rezef.
Emperor is ashamed to reveal that the Empress had an affair so he made it look like he had an affair with a maid and the result is rezef.
That's why Emperor hates rezef but still make him his successor cause in everyone's eyes Rezef is his only son.
Emperor also hates Cayene even though she is his own Cayen looks so much like the empress who cheated.
They are half siblings(cayena and rezef)! And ouh! You missed something... raph is an adopted son! At least thats what rezef said...cayena doesnt say anything abt his legitimacy tho
And razef also said hes a bastard son (illegitimate emperor's child )lol so yeah
Wait is that how you said it...im not good at english but anyway ...what im trying say is raph are not blood related to cayene

so umm sorry for being too dumb to understand but can someone pls explain one of the spoilers for me?
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so i've read in the comments that rezef and raph are actually siblings, then raph is the ml, so doesn't this mean that the three of them are siblings? ( rezef, raph, & cayena) or is it rezef and raph have the same parents (duke and empress) thus making rezef not an actual heir to the throne while cayena is the daughter of the emperor and his other wife? (coz they were half sibling???)