Yoon Sang still cannot forgive his father...but I was happy to hear him tell Min Hee that he is his father, and not only because his identity can be blown wide open (although that's most of it, I think).
Kang Pil Doo...he wants to acknowledge his son, but he can't. Yes, he was a bad father, and he made himself sick with all the drinking.
But I would like to see him come clean and do one right thing.
Hiding the truth may spare Yoon Sang, but it will hurt Seok Hoon, who has been so kind to him, even though they are not related.