
You find Woojin action is funny? FUNNY? u asking why we all are angry? Because when we had SUPER BIG secret and someone knew, every hint that someone trying to expose it made us uncomfortable and always on edge. Woojin know this fact and purposely pushed Haegyung trigger button by saying that in front of his parents. Put yourself in haegyung's shoes and i would like to know that you still think this is funny.
They had relationship before even they know their parents will get married or even know to each other. Not their fault, not anybody fault. Life goes on and unexpected things can happening in ur live.