kate, the coughing is good for us cfers, we need to clear our lungs as best we can, if she just started doing tobi or pulmazyme then she will be coughing more then normal due to the thinner then normal mucus, again this is a good thing. Its great to hear your concern and about the eating thing, in all honesty I feel my best after a busy day, the days just sitting at home doing nothing, i dont seem to get as hungry. So just have a normal friendship with her, maybe try to get her involved with exercise and the chest therapy you were doing for her was great as well, try maybe making it a time you can kick back together and watch tv while your doing the cpt so she knows your not there as her nurse but as a friend. And if she gets angry alot i think maybe you should tell her you found this site and let her express how she feels to some people that would understand, im sure it would make her feel better, good luck and god bless...