Oh my. I'd almost wished I hadn't opened this thread.
I'm sure there was nothing you could have done differently, but I know exactly why you might think differently. for the family who have to cope with this at this time of year.
A 47 year old woman handed herself in several hours later.
I know its stupid to think things like this, but if I had say let them sing one more verse, that car would have already passed through by the time they got to the road.
Oh dear, how many of us would have done things differently if it was given to us to see the future! Their song was a gift to you & your appreciation.. being so uplifted, was a true gift to the young ladies.
We'll never know the tragedies that have been averted by our actions, will we?
Please don't distress yourself further.