but for some reason it was hard to say so out loud . when she spoke , her voice had the same forced politeness it had had when shed first arrived at the table . his vision seemed to sharpen , but he did n't say anything . `` i do n't need more than six hours ' sleep . '' `` this must take a lot of work , `` she said , changing the subject until she could work up the nerve to explain why she was really there . hopefully , he would still think me friendly . 