She didn't die during the time of the events.
The family moved to another home and did not experience any more problems.
I met her once in about 1964; she was married, in her mid-forties, and I was a teenager. Danged if I can't remember her name. I just recall her as Irene's niece. I know she was dead by the time Irene died and I seem to recall my mother mentioning cancer.