I write so much because my cat sits on my lap. She purrs so I don't want to get up. She's so much more calming than my husband.
After my husband died, I could not write much - I could not concentrate. I was too exhausted most of the time even to contemplate writing. But I did take notes - not for fiction, but for a journal, or diary, of this terrible time. I did not think that I would ever survive this interlude.
I would suggest the widow do things the husband used to do, so he seems to be there with you. You will feel like just going to bed. It's so wonderful, going to bed.
Of the widow's countless death-duties there is really just one that matters: on the first anniversary of her husband's death the widow should think I kept myself alive.
I don't know what marriages are like in general, but there are many things which I don't talk about with my husband. We discuss practical problems, but I wouldn't sit down with him and talk about the distant past. It's somewhat in contrast to other Americans, who feel that they have to confess things, but I'm really not like that.