Its hard to tell exactly what's going to shut down
first - that depends on where the mets end up.
If you haven't already seen incontinence, etc, you
may. You might see significant pain despite the
meds, but it is HIGHLY unlikely.
She'll probably slip into unconsciousness, then start
to breath irregularly, then breath rarely (like once every
30 seconds) ... and then stop breathing.
From unconsciousness to death took my mother
about 14 hours.
Talk to the hospice people - they probably have
pamphlets that will be more specific.
I know that this will sound hollow, but you've
already lived through the bad part...
If she's conscious, or even if she isn't, just spend time
with her. Watch movies or read to her or lie down next
to her and be with her.
There are a lot of questions about cancer, but at this
stage, you're into something the body knows how to do.
It knows how to die, and from your Grandmother's
point of view, it isn't that frightening.
Its sad, but, you're with her and that is what counts.