Hello Dianne, thank you for the update.
It would seem that she's receiving (low dose) palliative chemotherapy. (ie
to help with symptoms, so she'll have to weigh the good vs the bad sides of
doing such).  Sometimes we just have to accept others' decisions. If she
doesn't have anything else she'd rather be doing at the moment, perhaps it
will work well for her. Some people don't mind being in hospital.  Hopefully
she'll have someone to care for her when she comes out of hospital? Or they
won't let her out until they're sure she's well enough to care for herself?

You've got a lot on your hands with the caregiving of your mother. I don't
envy you, but with your daughter's experience, I'm sure you'll all do fine.

Living one day at a time is great, but I do hope your mother-in-law has
taken care of power of attorney of care, will and other such issues.
Another issue another poster (we've not heard from lately) had was insurance
coverage/funds (making sure there's enough left for palliative care/hospice)
when the time comes. And in addition, banking issues if she becomes too ill
to get to the bank herself.  Special paperwork by a lawyer would be required
for that, I think, so nobody ends up in emergency financial status.  Also
someone to look after her current home and its needs, right?
<these are rhetorical questions - no need to divulge personal details here>
So there's lots to think of.  Hopefully these are all issues that your
husband can look into and make sure are taken care of. It would be less of a
worry for all.

My best to you.  Keep in touch.
J