desperatesister,
Keep up the good work. You do not need to answer the phone every time it rings - you deserve momemts of peace, quiet and serenity.
Maybe, just maybe what everyone is really saying with their "So you're really not going to help her?" question is "Wow, we're so proud of you for staying strong and not enabling your sister anymore!" What do ya think!!! (Just trying to put a positive spin on it.)