Both of my parents had DNR's and with my dad he had coded out in the ER but they did not know. So they worked on him for 15 minutes and brought him back. They kept him alive in the ICU on a ventalator. After a week we decided as a family it was time to let him go. The doctors said he would never recover and was brain dead.
My mother ad it rough with MS and pancreatic cancer. The cancer took over her whole body and I sat alone with her in her hospice room as she passed away. I know she would never want it. Being a devoted Catholic and all. But I wish there was a way that we could have helped her along.
I'm sorry you have lost both of your parents, NF. They must have been fairly young 'cause you don't seem to be an old geezer, yet. I have seen scenarios such as your fathers occur quite frequently.
I have jokingly said several times, when I'm older I'm going to have my directives tatooed on my chest but then, I might not be joking after all....