That is my question, essentially. Are cases like this (a year of repeating illusion impenetrable by relatives) a naive mistake or an undiagnosed cognitive disor

That is my question, essentially. Are cases like this (a year of repeating illusion impenetrable by relatives) a naive mistake or an undiagnosed cognitive disorder? Shouldn't people like her be at least partially taken care of? My buddy had a similar case with his sister. She would take a loan, be late on payments and then give loan sharks anything they asked for, without any checks and balances. Could take family money, etc, only to get rid of them temporarily. She was clearly unwell and so impassable that the whole family had to part with her (legally splitting apartments and even taking a kid). I'm not suggesting anything here, just thinking about it. Probably nothing generic enough could help here at all.