The right to sue a father for abusive behaviour against the mother

My mother has been suffering from mental abuse by my father from as long as I can remember. Even now, she continues to bear his behaviour for the sake of our wellbeing.

There have also been instances of physical violence in the past. Whenever things go against my father's wish or will, things get ugly verbally.

He doesn't resort to physical violence anymore, probably because I'm a 26-year-old male adult now and he knows I will defend her as I have clearly indicated it to him.

I would like to ask two things:

1) Is mental abuse considered as abuse within UAE law?

2) If yes, can I seek any legal action against my father on behalf of my mother? Because she won't speak up as it may jeopardise our wellbeing.