That can’t be easy to navigate. My dad has aortic aneurysm too, though not yet at a stage to take action, and due to his age of 87, I doubt he would be a candidate for intervention in the future. He has CHF and a few other ailments. There’s really nothing he can do, except take his meds and try to stay as mobile as possible.

I can’t know what you are going through , but did the doctors provide any restrictions for his activities? Is there any down side to him being at peace and feeling good about being home?

Would it be possible to get him some help in the home to care for your mother?

This is very sad and I know it's terribly difficult for you, but perhaps your father does know what's up and is choosing how to face it. I'm 78. When I was younger, I was so freaked out by the thought of death I wouldn't even visit my grandmother's grave on Memorial Day. When my elderly parents died--of heart disease and stroke--I simply didn't know how to cope. I have a better sense of things now. Honestly, both my parents lived about four or five years too long. Those last years weren't pleasant for them at all. If your dad goes quickly, as it seems he might, it might not be as tragic as you imagine. There's no way to make this easy. I'm sorry for your pain.