My family is not from the Hills, but when each of my parents died, some relatives misbehaved in ugly ways. It is apparently not uncommon.
Ugliness over inheritance is as common as the flu
Regardless the demographic
If he has the texts from the nephew those would be tuff to refute if we have the context
However the business manager has his agenda too
If you don’t designate someone the probate court gets the power
With no kids or husband alive I wonder who or what she desired as beneficiary
I assume there is a will that will define those wishes