<human>: My grandfather has been in the state of dying for the last three years. He's had cancer of the prostate, lungs, and recently a rare cancer of the foot. He's had chemo, several rounds of radiation and is still smoking heavily even today. He's obviously very miserable and in incredible pain. My mother and I have always been supportive of him through thick and thin and today my mom came to the realization that it's really time to put him in hospice. She told me and cried and my heart just broke.

She has always been the caregiver and has no support in taking care of him from my aunt or uncle and has a rocky relationship with her SO who isn't always the greatest source of support anyways.

I feel strangely at peace with my grandpa dying. I've watched him suffer for so long--we all know his miserable he is, how much pain he's in, how little he can do to make his life enjoyable at this point. 

His girlfriend (who has been pretty much my grandmother) is also on that verge. She has kidney problems, and the smoking has gotten to her too. We're guessing she might die soon after him--but unlike him she has no family, no monetary support from her family, and my grandfather failed to put anything in her name but debt.

The last small issue is that my mother and I are both chronically ill. Me with particularly bad asthma, and she actually has a cast on her foot right now (among other conditions)

Because their house is so caked with nicotine it is very hard for me to visit or stay long--but my grandpa won't go to a facility for treatment, so we'll have to come by and take care of him at the house.

What can I realistically do to ease this burden on my mother? How can I support HER? I don't want her to burn out from this or drive herself crazy trying to do it all. What are some things I can take care of to make this horrible period a little smoother?

Can you condense the text into a few key points?
<bot>: Maternal grandfather is dying of cancer, will start hospice soon. How can I ease the stress on my mom?