My grandmother uses Alexa devices in the house. What can I do to mitigate privacy breaches from it.

So, I live with my grandmother (I have a physical disability that prevents me from working, or even maintaining a normal schedule due to energy levels, physical weakness, and etc). I try to take care of her as she takes care of me. She has two Alexa devices in the house. One is located within the Kitchen, another is in her room. I've adamantly stated what risks they present to our house privacy, but she doesn't understand, nor does she trust me enough to give up the convenience of having one. I just simply do not trust those devices AT all. I believe these devices pose a potential risk.

What can I say to her to better help her understand my concerns, change her mind, or atleast prevent it from breaching my own rights while in the same home?