Just caught up with this, I am so sorry Dyan, what a worry.
it is hard when your Son is an adult living at home -I have been there with mine, done that, got the tee shirt, as they say!! Not easy
I think man to man is a good idea and a little insight to the family history. Nothing heavy and 'obviously it's your life and you are not a kid anymore, but your Mum and me are just a bit concerned, that's all'
I don't know your son and you may throw that out with the water, but just my thoughts.
sending love and hugs, try not to worry too much. PN x x