Oh my!!!!
How sad, big hugs to him.
I can understand why you are worried, I would be too.
He has to work with her? Is there anyway to make them
not see eachother at work?
How about a vacation, can he take one?
Sounds like he needs to get away for a short trip.
As far has her son, tell him to stop coming by, or
a Police report will be made.
This is really sad, hugs to you too,
(keep safe)