Hello K9 Sadie and welcome to the family. I think we may be walking in the same shoes here as I too am dealing with healing from a lifetime unhealthy relationship with my own mother. She too is of failing health (dementia) and my father passed last year. Though not the easiest of things to deal with, I've found the journey healing, and it's helping me become a better person with the more I learn and understand.
To the right of this page you will note some lessons and a survivors guide. I think you may find these helpful in your journey. At the top of the page you will find the tools section... .some very good guidance there as well.
It's great to see that you have taken a step of self improvement and healing by going to a therapist.
One thing many of us have learned is that we cannot change them, but we can change how we react/communicate with them... .and that's something we control.
I also found that reading others stories, and subsequently reading the responses on their threads to be very helpful. It will also show you are not alone in your struggles. Here you will find understanding, compassion and some guidance through shared experiences. We look forward to hearing how things progress! Feel free to post anything anytime... we are here