She called everyone in the family to visit him and ask for his forgiveness. [...] She didn't tell anyone he was going to die but that we needed to ask his forgiveness. Weird right?
What's weird is the forgiveness! What on earth were you all supposed to have done to this man that the entire family supposedly had to ask forgiveness for? Didn't even one person say they were busy and weren't going to cater to someone's daft whims?
Lots of it is passed down through genes and nothing to do with being Romany, or anything else. E.g I can see aura in people and colours in music, it's called Synesthesia I'm also Clairaudient too. Only 1/2000 people have this and it's hereditary. So this isn't because I'm Romany, but a member of my family passed it down.
Synesthaesia is a well-known phenomenon, with various neurological explanations and a definite genetic component, but clairaudience or clairvoyance has ever stood up to a well-conducted objective, repeatable test, and nor has the existence of auras. Saying you've 'inherited' clairaudience is like saying you've inherited an invisibility cloak.
how could he have possibly known that my ex friends DD had collected acorns on their last visit to the cemetery and placed them on the grave? They were ALONE and she'd never even told anyone about it not even her husband? That's not something you could read from a persons body language
It's just hearsay. You weren't either at the cemetery or the 'reading' -- you have no way of knowing what combination of mistakenness, wishful thinking, confirmation bias, exaggeration etc took place in the account of the events that was passed on to you, possibly entirely innocently.