At the end it was for the better (except for my mom's and grandmother's - when she was alive - deep suffering of course). We divorced from the vicious part of the family, no contact at all with a few aunts and cousins, my parents fortunately could afford to give up of their part of the inheritance and it was totally worth to buy our freedom of any need for future contact with them.
For me, it was a lesson that absurd unethical behavior within a family happens in real life, it is not a thing of soap opera.
Fortunately, there was no crime committed in my case. "Only" obnoxious behavior, greed, and extreme selfishness.