I hate to tell you this, but you cannot will yourself out of a terminal disease. Even if she was cured, at some point she would cease lving. Unless you mean to say that we are responsible for things we cannot control. That of course doesn't make sense. Am I responsible for the motion of the planets? Or the kidnapping of a child by a militia in Africa? Would I be allowing myself to die if a sudden, unexpected hailstorm left a golfball of ice in my temple? No.