Do you think Lucius Malfoy really loves his son?

I mean sure, hes a bit of a but i mean...his own son....do you think he would be honestly saddened by Draco's death because he was his son and not so much that he was his heir? I don’t know why but I seem fascinated by this relationship...and I can never really tell whether he loves him or just likes the fact he has an heir... And his wife, Narcissa, do you think he really loves her also? What are your thoughts?