Autism and divorce

Hi everyone, I’ve just joined.

I need some advice please regarding divorce and the finances. Ex husband owns house and we have been married for 25 years. We have a 24 year old son who has autism. Ex was arrested for controlling and coercive behaviour last year. Ex has been abusive both mentally and physically to both of us.

Is a 50/50 split fair or should ex provide more due to our son living at home with me?

Thanks