Throughout the year, JoAnna never sent Voldemort another letter. And she did everything she could think of to annoy Umbridge. She ended up getting quite a few detentions and eventually got marks like Harry had. Then one day at breakfast, they were planning how to annoy Umbridge today when JoAnna received a letter. It was from Lucius Malfoy. It said, "Why haven't you sent any more letters to our master? He is awaiting something and mark my words, if he doesn't receive one soon, he will kill you when you next meet."
"Harry!" she yelled. He took it, read it and lead her out into the corridor into a dark, little corner.
"I knew this would happen. You need to make something up and tell him."
"Like what?" She was on the verge of tears.
"Tell him I hurt myself playing Quidditch and am vulnerable."
"But then he'll come after you! I can't do that to you!"
"No he wouldn't dare set foot in Hogwarts. He'll ask you to kill me for him and then you'll say that you will need some time. Then don't write to him again."
"Are you in a coma because if not this won't work."
"Say I'm in a coma if you must."
"Ok I can do this." I'll write the letter tonight."
"And I'll help you if you wish."
"Yes please do."
"We'll meet in the common room after everyone has gone to sleep. Deal?"
"Deal."