My grandparents were divorced years ago in Kentucky. The papers declared there was no marital & non-marital...

Was the California house where your grandparents lived as man and wife ? If not was the house a marital et that your grandpa concealed from your grandma at the time they were divorced ? or was the house built after your grandparents were divorced and for reasons you don't know about your grandfather put your grandmothers name on the title ?.