John,
I watched our dog be put to sleep. Brought back memories of my dad dying too. I wasn't allowed in the hospital room because they knew he was going and didn't traumatize teenagers back then. I sure wish I could go back and be traumatized. I would know to sneak in and break the rules.

He deserved to have his family with him.
The vet was really worried when I burst out in big floppy tears. Wanted to call my husband.

I honestly couldn't speak to tell him I was fine and just hadn't cried for a long time.
Take the cat to the vet, the fine is sure to cost more. Plant something in it's honor for the kids, but be prepared to hear the crying over tabby's tree if you ever move or have a bad storm.