de peur que = ...for fear that YOU'D be offended our YOU'D be lying

 In the lesson, the example is " Ilviendra de peur que tu ne sois vexée."

and the translation is "He's coming for fear that you'd be offended." It is says: YOU'D or you WOULD be offended

So the quiz is I didn't want to listen for fear that you'd lying.  so why isn't it "Je ne voulais pas écouter de peur que tu ne SOIS menti" just like "tu ne SOIS vexée"?

But you say the correct answer is "Je ne voulais pas écouter de peur que tu ne mentes."  

thank you.