My deepest sympathies. Something like that would have me shaken up for months, if not a year or more. It truly is tragic.
My families aspies seem to be fractured into two camps. Those who show no emotion, and those who can’t control their emotions. Of course, my mother is the bridge, who flies randomly between both extremes. When my father passed away at 47, and I was 19, she determined that it was “for the best” and “he got what was coming to him” and forbid my sister and I to grieve. She could not understand, that at the end of the day, he was our father! Eventually, talking it through got her to understand… sort of.
I also have an NT sister who seems really cold and detached in these sorts of situations.
Hopefully by talking about your grief, and the natural process of grieving, your husband will understand. You may need counselling for this too, especially if you can‘t get the emotional support at home. Try and reserve some of the advice you are giving your students, for yourself. Not always easy.