Not sure it's a good idea to delve into the history of the Duke family. At least not all of it.
IIRC Doris had a 'relationship' with her butler or driver and 'accidently' drove over him after a misunderstanding. I think he was pinned between her Rolls and the gates of the estate.
The Newport, RI police declined to arrest her after she promised to donate millions to the pre-Revolutionary village in the old part of Newport.
BTW her 'driver' happened to be black.
I suspect she might have done the same thing if he had been purple. Doris had some issues.