Sorry Rusty, yes, of course your son will not be a jobbing plumber, as
I remember you once said he ran a good business (I think).
It is indeed a good policy to help an old lady who will pass his name
around - as you say, word of mouth is the best advertising.
I understand work ethic, but if the conditions are dangerous, what
can you do?
Anyway, I am sure she is a very sensible young lady, and will make
an appropriate decision in the morning. As you say, there may be
no pupils to teach!