Your son is non-responsive at the moment.

- Do not admonish him via text / email.
- As hard as its going to be do not initiate contact with him

Anything you say to him will increase the resentment she has planted into him. If you're going to lecture him make sure it is face to face.

- Do not count on her family having any influence on her. She is lost and will lash out at any- and everybody that tries to stand in her way.