Hi @Menevilence ,
It sounds like your sister is very unwell. I don’t know enough to understand what it means in terms of guardianship. Am I right in assuming your mum is aged?
I hope your sister will find the support she so desperately needs. Being unaware of her delusions probably tells you she is very unwell as she cannot differentiate reality from delusions.
Sorry, I don’t have much to share,
BPDSurvivor
