The dad should show affection to his 3 sons too he only care about the MC

RIGJTT I ALWAYS CRYING AT THE BACKSTORY OF HIS THREE SONS. LIKE IT'S SO UNFAIR HOW AFTER THE WIFE DEAD, THE DUKE JUST ON HIS OWN WORLD AND DIDN'T EVEN CARE ABOUT HIS THREE SONS?? THE DUKE DIDN'T EVEN CARE ABOUT HIS SONS APPEARANCES TILL THE NOBLES TALK ABOUT IT :// BUT SUDDENLY WHEN HIS FIND HIS DAUGHTER BACK, HIS SPARK COME BACK AND SAID HE CAN ONLY BE HAPPIER WHEN HE'S WITH HER?? LOOK AT YOUR OWN SONS PLS I'M CRASHED OUT FUCK