Re: Easy
Just like John Marshall.
When he reneged on a deal to surrender his castle to King Stephen he was told that if he didn't carry out his promise his 6 year old son (whom he'd given as a hostage) would be killed. Spoiler alert: he survived to be the famous William the Marshal).
His answer (either as the kid was being strung-up to be hanged in front of the walls (or loaded into a trebuchet - I think they did both at different points - "I still have the hammer and the anvil with which to forge yet more and better sons!"
I guess that was the fate of 4th sons in mediaeval times...