I don't think I could stay with someone who hurt my child and might do so again... but it's so hard to know what you would do in a situation until you've been there.
If "mentally unstable" means personality disorder, drug addiction with no motivation for change or something similarly intractable then, no, I like to think I would not stay.
I guess it would also depend on how brain-damaged my child was and how old they were. If it was mild and they were young and living with their father would be traumatic then probably not. If it was severe and left them with no ability to recognise who they were living with or if it was mild but they were grown up and living away from home, maybe yes.
It's a complicated situation. I don't think there is one right answer.
Mother of two spectacular girls, born mid-2010 and late 2012
I'm with katelove. It's too vague to say, and it's a complex issue. Mental disorders can range from 'doing one really terrible thing due to a mental break that in retrospect had lots of warning signs and is eminently preventable if looked out for', to 'permanently unreliable'.
Horrible situation though. :(
If decomposition persists please see your necromancer.
This is actually up for discussion? Severe brain damage and she is staying with such a monster?
The bastard that harmed a child should never be allowed to have any contact with that child ever again.
No, as the child's only protector, I would owe it to my child to keep them safe and away from any abuser.
If this woman is really standing by her man, then she should have no contact with the child either. In staying with him, she is not protecting the child.
Child abusers do not deserve a second chance.