My mother is 83 and in somewhat good health. She's had a narcisstic personality my whole life but at her age it seems to be getting worse. She has turned my siblings against each other so now I am the only one careing for her. She lives in her own apt. but it's up to me to take her where ever she wants to go, store, drs. appt., etc. She is on a very limited income, all she wants to do is spend and spend, a VERY touchy isssue to discuss with her about to say the least. How can I keep her on a budget? She thinks if she runs out of money one of her children will take her in, so untrue. I an in charge of her checking account but that doesn't mean anything. When I do try to discuss this with her she becomes very angry and yells and hangs up the phone on me. She could easily live another 10 years, I don't want her to run out of funds. Can someone give me and suggestions?
By the way, whether or not deep down some part of her knows she isn't perfect is a big topic for the psychologists to get philosophical about, but in everyday life a true narcissist absolutely cannot tolerate the idea of having or acknowledging any flaws, so they have to project them onto you. You must understand that and work that into your handling of this situation. The mere fact that you're doing all this AND wondering if you're a horrible daughter means that the way she pushing negativity away from herself and onto someone else is working on you. Again, step back and look at this. You get to survive and you get to be happy.
I don't think there is anything you can do to stop this (unless she is judged incompetent by a court). You can think ahead about what your response will be. Help her apply for subsidized housing? Apply for Medicaid (if she is ill)?
You might tell her sometime what options you've come up with. "Mom, it looks like your money might run out. If it does, you might qualify for subsidized housing. There is a high-rise for seniors over on Glendale. Would you like me to take you to see it, just so you know what it is like?" This might be where she brings up living with one of you. And you get to explain firmly but calmly that that ain't gonna happen.
Somehow I doubt that will stop her spending, but at least it won't be a surprise when she is high and dry and no one is offering to open their home to her.
From the symptoms you describe, this may be a reality.