Late to the pass but just want to offer my best wishes to you, all I can do is repeat my previous advice of reminding yourself she is old, you will outlive her . Sadly some people are just bloody toxic and nothing can change that. She has bee out in her place so hopefully she will now ease off over Christmas. I have no conscience I would wish for her the same as I wish for my own mother. Those who only offer harm and bitterness are better not walking this Earth for their own sakes as well as everyone elses.