MIL is only 72. She has vascular dementia & recently had a few episodes of blood pressure going really high. Since the last one, on Thursday, she has not really been moving, eating or drinking. Today they called the doctor round (not before as she was calm & happy & is DNR so wouldn't go to hospital etc) & he has confirmed she has hours or very few days left 
PIL live 2.5 hours from us. DH went up there yesterday afternoon. He was going to come back home last night but in the end he stayed & is staying until she goes. FIL & SIL are staying too. He gets upset in spells, but he generally feels relieved that she is not suffering too much & the dementia has not been as drawn out as it might be.
I am finding it incredibly tough. Our 3 DSes know that Nannie is poorly (although not the extent of it) & are playing up a bit (DS2 has autism so not easy anyway), so it's hard on a practical level. I also wish I could be there to support DH, he just phoned me & broke down in tears on the phone
& I miss him! We have only been apart a very few nights in 21 years together. Also, I really love MIL, have known her for over 20 years & I am just gutted that she has to go so young. It seems so unfair.
Sorry for rambling, it's a whole jumble of emotions & nobody is around to talk today. I desperately need a reassuring hug from somebody who is not the DC but that's not possible 