I can only tell you what happened when my first husband died suddenly in a car crash - he saved my life by driving away from the oncoming vehicle onto the grass verge.
What our then minister said to me the day I got home from hospital stayed with me and helped prevent me going into the depths of despair when my Mum died slowly of lunch cancer,and my second husband died in a climbing accident.
Matthew sat at one end of our settee while I was in floods of tears at the other end. He waited for a lull in my sobbing, then said 'Annie, look down there' and pointed to the floor. I looked down and he said 'that is a deep, green, slimy pit, you are sliding down into it, there are grimy hands reaching up for you - here is my hand if you need help stopping you slide down.' He held his hand out, after a second or so analysing what he meant I reached forward, grabbed his hand, and fell into his arms, still sobbing. I never looked back. What I didn't know at the time was that May, his own wife, had just been told she had terminal lung cancer, and had three weeks to live. She died three days after Sandy's funeral.
I remember what Matthew said whenever I feel sad and depressed at losing three of the most influential people in my life, and although it seems a depressing thought - all those horrid green slimy devils - it does help me right myself.
Your husband is very lucky to have such a loving wife, and i send you all my best wishes to help him get through it.