Comforting husband

[Babyshine2020]

I don't know what to do.
My FIL was diagnosed with cancer 18 months ago and was given 6 months, in the last 2 days he's just disappeared into an empty shell and we've been told the doctors will make a decision on end of life drugs on Monday.

I don't know what to say, what to do, we're expecting our first child in a few months and we always thought he'd be there for that. My FIL is refusing going to the hospital and taking any tablets other than his usual medication.

I'm just lost. Any words of wisdom?

Sadly death and dying are very simple :( Support your DH so he can spend time with him, do what can be done to make him comfortable, take little photos and videos if that's reasonable/possible (perhaps record a message for the baby?).

If you feel you want to do grimly practical stuff to take the weight off DH, you can ask undertakers for quotes, check (if he's an executor) where the will is (and other paperwork), make sure you've got contact details for family.
If he doesn't live on his own and still has capacity it can be helpful to put things like utility bills etc in joint names to ease admin for the survivor.
Drop anything that can wait. And look after yourself too.