By far, it's the worst part of the whole situation

Let me get a few things out, and then do what you will.
He is a very late stages Parkinson's patient who has been in this battle for 26 years.
She is a cancer patient that is her husband's caretaker.
In his case there's a bit of everything when it comes to a patient of his type from full on needing to be fed (he can't figure out foodd sometimes, at others he can't hold it), dimenia has kicked in pretty deeply so at any point in time we could be dealing with anything from a prairie dog to a SWAT team in his living room. Bathroom help, and accidents, 2 extremely lucky low level falls, but every piece of equipment imaginable is acquired to help with this. He's fit, somehow, but he's 6'3, she of course is 5'8, and has slightly thrown her back out trying to stabalize him during a blood pressure reading. She, ironically, has started to use some of his equipment. It stresses her out beyond belief, understandably after a 40+ year marriage. They are slowly going broke between things like rx, equipment 1 hr+ rides into town for the doctors, and replacing things he breaks.
Oh yeah, like I said. Cancer patient, skin to be specific. It's never anything bad, they always catch it, but it never seems to stop coming back. Her worry is that she will go before he does. She doesn't know. I asked her if she was ok, and bless her she has the worst poker face. She says enough out loud to get the gist though. The disability program nurse has been trying to fight it, but she's thinking they want to put him in hospice, which my mom's family had a very bad experience with with my grandfather.
He's a proud man, but can't eat, has a hard time going to sleep because his body will start to migrate. The tremors make your muscles really sore after a while and you'll start to see him bending into himself. Poor guy then has night workouts before going to bed, just to keep him limber as possible. Plus, he's aware that his mind is slipping. I think if it were just the body, it would be passable, but the mind stuff gets to him.
She is the hardest worker I know, which is awesome, because after living here for a few months I have started to see that this is a 29.5 hour a day job. There's always something else, which can't even really be ignored. You learn real fast how much you can delay and play with your multi tasking. Oh yeah, also because of the rigid schedule, and mix with tv and what not, it feels like the same day, over, and over, and over. That was an unexpected Hell, not to mention, the costs. Costs costs costs costs costs costs, but to see them smile because they can walk themselves to the kitchen. Worth every possible bit.
I just want one afternoon where they can forget all of these things. For one night enjoy life for the sake of it (even though they are both eternal optimists), laugh, PAIN RELIEF, all of it. There seems to be one EASY answer to all of these things but ya know, moral boundaries. However, they are bringing me to tears.

TL;DR: I believe my Parkinson's/Cancer patient parents could really use marijuana edibles, pain management/depression relief more than anything.

Dog tax/current mood.