Sounds like a tough situation.
I grew up with a grandfather that use to be argumenative all the time. MAde threats and all kinds of nasty things.
Its hard. Especially when you cant do anything about it.
I dont know..But sounds like she may be just saying she will stop just to get you to back off. Or maybe she is trying and cant stick to it.
Never the less. She isnt goin to stop until she is ready and wants to.
Unfortunately theres nothing anyone can do to make her.
I feel for you. But like said. There is a friends and family forum.
There is alot of support and info here. Hope you post more. And take care of yourself.