While I've not experienced this aspect of life for myself, my hubby has with both his mother and brother. Mostly his brother. Yes, it is horribly stressful for any of you who have to experience this. There were many, many things I overlooked BECAUSE of the stress he was dealing with at the time. After all, his first and only priority at that time should have been his ailing family members. When he felt guilty about it, mini and I reminded him to not, because it's not like any of them asked for this. His brother didn't ask for cancer, and his mother didn't ask for leukemia. To ease his mother's burdens, he took on all the care of his brother. You're right. It's a thankless job. Know that the person you're caring for, though, even if he or she doesn't mention it, DOES appreciate it.