Unfortunately she will have to do something herself. What is there to report Dutch other than the behavior of the husband and the look in the patient's eyes. My mother was abused and we all knew it but our hands were tied until she herself did something about it.
A child you can get the courts involved but with a consenting adult your hands are behind your back hon.
It is very sad when you feel that something is going. Now witnessing him hurting her in some way maybe then you can report it eh?
I do hope she is going to be ok though.