Shagwell: You have to answer. He asked you 3 times.
Mustafa: No, no, no! No! The second question was: "do I really have to ask you 2 more times?" So that would be the first question in a new line of questioning and wouldn't count in the other line of questioning.
Mustafa can't stand to be asked the same question 3 times because it irritates him so he always will tell the truth after 3 of the same questions.