My Mother-in-law refuses to accept the fact that dad has congestive heart failure. [ages 88 and 95 respectively] She keeps referring to the cold that he still hasn't gotten rid of since he was in the hospital for it. IT was pneumonia, not a cold, complicated by his congestive heart failure. Nope, he won't use his oxygen, either. That lasted 6 or 8 weeks after he got out of the hospital and that was it. And he keeps cancelling doctor's appointments. Mom says, "if he had heart trouble, he'd be dead by now!". Is there anything we can do?