Someone please explain to me why Harry didn't believe this. When PW swore on their mother's life that all he wanted was for his brother to be happy why didn't Harry believe him?
Harry says his brother "crossed a line". He used the trump card he hadn't used before which they had promised to each other they would only use to get through to each other for something really important.
It seems to me that PW didn't utter those words lightly. That he chose the moment to use his trump card because it was so critical to get through to his brother. Then why did Harry reject his attempt as fake? Why isn't this explored in the interview?