the priest said that blue means there is a trace of the kalisto. it didn't mean it is a trace of the duke's direct blood present in the child's body. She should be his young sister instead cuz it makes zero sense that the father who was with many women and got children and during the time she was able to be born is not the father but toss all fault to the son , current duke. I dont care if the author will say it is the duke's I say it is the former duke, the current duke, who is the real father.
the current duke to my eyes is actually her older brother :>