Ex or not, that must be very hard for you, too.
My dad (as you all know!) passed away from cancer at the age of 62. His illness was approx. 4 months from diagnosis to death, although he suffered tremendously for 3 months prior to the cancer confirmation.
After he died (actually during his illness), my mom fell into a beer bottle. When we finally convinced her to move in with us, she weighed 92 lbs and was drinking up to 18 beers a day. And that's Canadian beer!
Thankfully, she had a medical incident which hospitalized her for a week, and was able to dry out 4 months prior to her passing, also at the age of 62.
But boy, oh boy, let me tell you, those first few drunken months that she lived with us were awful. I would hear her stumbling around and falling at all hours of the night, and have to get up and physically put one hand on each hip and walk her to the bathroom. All she wanted to do was drink until she passed out, so she could "dream about him", she said. The situation was pretty difficult. It didn't help that I was so angry with her all the time.
I remember her saying to me one time, "You wouldn't be treating your father this way", and me responding, "My father wouldn't be acting this way".
Good times.
Before she moved in with us, I had high hopes of how things would go. I thought she would join us for dinner, watch t.v. with us, maybe play cards once in a while. Things didn't quite go that way.
Clearly they were better once she stopped drinking, but that's when she decided not to deal with her abdominal aortic aneurysm, and just let nature take its course. By cancelling the surgery, she knew that there was a 20% chance of dying within the first year, 40% in the second ... up to 100% mortality rate within 5 years.
She died less than 2 months after the cancelled operation.
I have since come to say that she died the same day my dad did - it just took us 18 months to bury her.
Each situation is different, and yet they're all the same. Watching your parents, your heroes from childhood, decline sucks. Plain and simple.