I never said it was fair to the father.
But on the other hand, she also could have decided to never let him know he had a child at all and rise it all on her own. This shared parenting is a modern thing anyway.
She grew up in this country as a commoner. And commoners were treated as livestock, while illegitimate children were treated even worse. She was somehow able to escape this place and could live in freedom far away.
Just because the king changed the laws and customs because of his adopted commoner illegitimate sister, doesn't mean she has to think this would be a welcoming place for her commoner illegitimate son.
I'm so sad for the king barely meeting his kid, he would've been such a good dad from the beginning. Dang u pirate lady (╯°Д °)╯╧╧
Although I hope the king meets her again or finds someone else. He deserves a family