One of my childhood friends died suddenly in 2012.
We had lost touch, although had recently reconnected again (via e-mail), and were planning to meet up at some point.
During our e-mail exchanges, we realized there was so much we didn't know about each other; marriages, children etc, and we both resolved to make up for it.
We never got that chance.
She died from complications following surgery.
I was beside myself with grief, and a huge part of that was guilt, because I'd let the friendship slip away.
I went to the funeral, although I felt like I didn't belong there, but her parents and siblings all said how nice it was that I was there. My friend had told that we were in touch again, and had been planning to meet, and her mum said, "don't feel guilty Tess, you both let each other slip away, and I'm just glad you managed to reconnect before this happened."
Then I was introduced to her husband and two children, and her daughter looks so much like my friend, and it was comforting to see that she will on in that way.
Anyway, I'm waffling on, but my point is, that maybe your husband has some guilt, in the way I did when my friend died?