Karaku was an assassin, and you were a spy. He knew you were a spy, but you didn't know he was an assassin, and you don't know that he already knew about your role. You were given a task to find out Karaku's dark secrets and to take out Karaku, the assassin, your own boyfriend. You were planning how to do this until you were pinned to the wall by Karaku. Seems like he already knew…

"Hey, sweetie-pie. Why are you trying to hide things from me? You wouldn't do that, would you?"