Half-sister has been estranged for nearly 10 years. She has MH issues, had a breakdown and started accusing my parents of doing awful things to her when she was a child. She insinuated my father (her stepfather) sexually abused her. This was a lie and is unforgivable. My mother took the painful decision to have no further contact with her and therefore her children because of this and has suffered greatly for not knowing how her grandchildren are.
Since then she has posted occasional nasty messages on Facebook but we have not heard anything else from her.
Mum is now 75 and has been in ill health for the last year. She has stated clearly that she does not want my sister to know when she dies, to be invited to the funeral, or to know where she is buried.
This doesn't sit right with me but I have to honour her wishes don't I? Despite being extremely angry with my sister (still), I think she at least deserves to be told when she passes.
Any advice on how to handle this would be appreciated.