Princess Serena does not like to beat about the bush. She knew this guy had serious differences with her and she was ready to sit down and talk about them. But the guy was not ready to do the same and she was pissed. She did not like how he wanted to use underhand tactics to fight the war. She went to him and confronted him. She even trampled him cruelly and made him regret his choice of underhand tactics and also apologize.