I have a very very good and close friend who lives with her autistic adult son. He's able to drive but can't work so he is in the house with her for most of the day every day and he is becoming incredibly controlling of her behaviour. He monitors what she eats and drinks, tries to stop her eating or drinking anything he doesn't approve of, goes through her bins to see what she's had - you get the picture. He's behaving like an abusive partner and she doesn't know what to do or how to stop this.
My big fear is that something will happen to her (not at his hand. he's not in the least violent, but she's in her 70s and could get ill) and he will withhold drinks or food or try to make her behave in the way he approves of (so getting up to cook him his lunch even if she's bedbound with illness).
How can I advise her? At the moment I'm just listening, but I'd like to have something I can tell her to do or something to offer other than platitudes and 'that must be difficult'.