Yes, offer up your fucking neck you piece of shit "father." You don't even deserve to be considered a father. You and that king both should die horrible deaths. Same with his son. End the line since it's full of trash anyways.
Scarlet's brother is fine so he can live on.
That piece of shit father deserves all the suffering he can ever have. And there was a way, fuck the kingdom, just accept being a vassal state to the other country. Your pride to keep your nation killed innocents. Could have been avoided if you just contacted the country and willingly submitted. There's no reason to assume they'd treat you badly beyond just demanding taxes/payment regularly. Fuck them all. That kingdom deserves to die if its leadership are this shit and unjust.