Announcing?

My partner's grandmother is on end of life care, she may even already be dead as we've not had an update for a few hours (we live out of the area, we were getting regular updates up until yesterday afternoon, it's 8am here now). I wasn't going to announce this pregnancy but we are visiting my partner's family for Christmas next month and his mum is really struggling (her youngest child just moved out in September so she's on her own, her dads death anniversary is a couple days after Christmas, and now her mum is dying/potentially already dead). Should I announce just so she has a bit of positive news? I miscarried in July and I know she was upset about it also.

I'm just so lost for what to do. Her mum never even got to meet our son as the housing she lived in didn't allow children under 2 to visit and nobody has hosted Christmas/Easter dinners since he was born. I really don't know what to do, I'm trying to get my 12 week scan at 10-11 weeks so I get it before we go away for Christmas but if I don't get it early I have no way of knowing that this pregnancy is going well beforehand either.

What would you do in my situation? I didn't want to announce this pregnancy but if it would help cheer up my MIL I would be willing to announce. Should it depend on if I get my scan early or not? Please give me opinions on this 😫

***just got the update that she passed yesterday afternoon just after the updates stopped coming in***