@Dazai
Spoiler!
His adopted son is his subordinate's child who is a grown up and his biological son is quite younger and he was getting abused by his nanny because Duke is a neglecting him
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 