Responses
I don't think they're blood related at all. Carsen's father is the duke, while Kael's is the king. The current queen (Kael's stepmom) is Carsen's aunt, which is the sister of the late duke. Kael's younger brother, the second prince would be the one who has blood relation to Carsen because they're cousins.
ok so kael and carsen are half brothers? maybe? i think they might have the same dad because the youngest brother talks abt carsen receiving his mothers potions which was his dads latest wife before he died and the dad was married before he got with that lady to kael’s mom who died and he raped a maid which would be carsen’s mom and also the youngest brother has purple eyes but also at the beginning he said kael was his brother