hello dear
i can understand that mental hospital must had explained you in the medical terminology
so let me make it very simple -
after the death of your grand mother your mother had developed some kind of fear, like fear of death
it may be due to death of you grand mother would be in unusual circumstances only, which affected your mother's mind
and now she developed lot of suspicion for everyone that all are her enimies and all wanted to kill her by giving her poison or other means
and for that they all are talking on her back
even you or your sister is also not reliable for her
she is not have faith in both of you now
its not her fault but ya she faced such situation and so she is under this phase
she must need some of the anti psychotic medicines
especially
homeopathic or bach flower which are best for such kind of psychological conditions
1. hellaborus 30 1dram 5-5-5
2. hazel nut 5-5-5
both are very effective in such cases
go for this for about 2 months and follow us with the response
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