Update: so my T did offer a session just 4 days after the death of her husband. She said she had evaluated that she was okay to work with clients and had decided to do so. Possibly because it wasn't sudden or a shock. She had been living with anticipatory grief for several years.
So we had our session, and it was a little weird (from my perspective) but okay.

Early on, she told me the next 4 weeks would have 2 breaks; one for half term when her grandchildren would be visiting and two weeks after that, the week of the funeral. Understandable.But she muddied the waters slightly by saying if she was free and in the right headspace, she might offer Thursday (instead of our normal Tuesday). I said I would take it that we weren't meeting and anything else was a bonus.

I wish she hadn't said it though, because the very fact that she did, opened the possibility of a session. But it didn't happen, and instead of being able to get on with my week, I was living in anticipation that it might. Brains are so stupid sometimes! (At least mine is).

So our pattern is 1 session, then a week's break; then another session, followed by another week's break. It will be mid June before our schedule gets back to normal. I know it can't be helped. Life happens. Unfortunate circumstances get in the way. Doesn't stop it feeling totally ***** though.