Why would anyone be bitter about family members getting cancer? If some big company polluted the water in their town with hexavalent chromium and that caused the cancer in all the family members, I could definitely understand bitterness, but this doesn't seem to be a case like this at all. Most of the time, cancer just happens unfortunately, and isn't directly caused by some evil person or corporation (at least as far as we can tell in most cases). Why would someone be bitter about it? Angry at god or something? Sad, sure, but not bitter.