Cannot imagine the pain they are going through.
I think asking the husband if he has any thoughts to share. It might also be too soon.
For me the second holiday season/birthday is always the hardest bc everyone has moved on, and expects those grieving too also. But the protection of denial is no longer there so it still feels so raw.
Please dont be afraid to mention him, especially if they initiate it. For the grieving family members this acknowledges the significance of the deceased, how special they were, and that they are missed.
Last week there was a post from somebody who had lost irreplaceable items that were in storage. I guess that makes me think of how precious all those projects, lovies, toys, pictures, etc. of that 3 year old are. If you can determine what to preserve, how to preserve it, and have protected copies or copies to different family members I think it would be so treasured as time goes on.
May they find comfort, especially during this season.
ETA: I agree to also include the children.