My daughter has been in similar situations, she even had the nerve to tell us….the person letting her live with him has helped her more than we ever did. Wow! What a huge slap in the face.
I have confronted people about how my daughter is and guess what? It was thrown back at me, they defended her because my daughter told them lies! Am sure your son has told them the most horrible things about you and would only hurt yourself more trying to warn them. These people need to learn for themselves as the people who took my daughter in found out quick enough, and kicked her out.
You have so many good points, just keep repeating them, to remind yourself how your son really is at this time.
When my daughter called from the jail the other day my son said, Mommy you damn sure know she was not calling for any feelings about you, but how you could help her. He was right.
