Something similar occurred in our family many years ago. It was one of my great uncles (a brother of my maternal grandmother) who remarried late in life & left everything to the new wife. As I recall there were differing opinions within the family on the subject. There was some consternation that the "johnny-come-lately" wife walked away with everything. But then there was also the perspective that she took care of the old geezer when he was ill. Realistically it didn't really matter to my parents one way or the other since they would never have seen any of it anyway.