Hoshigaki and You were eternal enemies. She was angry because her family was destroyed by your clan’s behavior. She decided to avenge her clan and annihilate yours one by one, no matter how much it cost or sacrifice that’s never will stop her. So you decided to fight with all your power and then she hit your katana away from your hand and pointing at your heart with her katana saying.

"You betrayed my family! They never disrespected or insulted anyone! But now I will betray your entire clan!"

she growls and you were by her side to defend her even if it’s need to sacrifice your own life by the clan. Your destiny depends by all of them.