Everyone is confused but it is obvious, even Hwa himself said that he does not understand the situation. They are going to have three children, one is forming separately and the other two are twins, why they are going to die? nobody knows therefore they are going to investigate. Then Hwa cares more about his lover's life than children like his dad did time ago.
-He said: I don't like guys who are easy
-other guy understood: please make me fall in love with you