Called the florist today to lodge a complaint. Got Customer No-Service. They told me to call back tomorrow during more normal business hours on a toll number. Wonderful.
I decided I would call W's aunt to apologize to her for any misunderstanding about the flowers. She was actually pleasant and thanked me for them, and said not to worry about the florist's gaff. I apologized for the firestorm this created with W and MIL (the aunt's sister), she quickly said she didn't want to get into their words. I asked her if there was anything I could do, and told her I was sorry for her loss. She briefly touched on how hard it was for her but more-so for their cats. But she was focusing on the good things in her husband's life and that gives her comfort.
All in all it was a fairly nice conversation, although I knew she had to be uncomfortable talking to me given the battle lines that have been drawn. Still, I am not going to be deterred from doing the right thing, the Christian thing, the magnanimous thing, just because of how some people can only bear the fruits of bitterness and hatred, and seem like they can never get beyond that. Life is too short for such pettiness.
I have no expectations out of any one in that party beyond this. The W's war will undoubtedly continue, much to my chagrin.