I have recently cut all ties with my siblings, except for legal matters.
Just one example of why:
My Mom passed away a few months ago, they never called or visited, I was her sole caregiver for years, and yet my sister called the Funeral Home and had my Mom's ashes sent to her in another state, without my knowledge or consent, so that she could bury them at her convenience in the family plot.
I may have Asperger's, but I would bet money that my sister is a certifiable Psychopath.
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"It is no measure of health to be well adjusted to a profoundly sick society." -Krishnamurti