fortunately for your mom's sake, that's not the way it happens.Mom was baptized a Catholic and saying I accept Jesus as my personal savior would be redundant. If your mother was truly contrite for her sins, whatever they were, she was forgiven them and went to Heaven as a proud and justified Catholic...Praise the Lord!!!
Until someone is born again, all our righteousness is as filthy rags. We are under judgment until we accept Christ as our Savior. It requires the act of being born again, not just believing He exists or is God, as Satan and the demons do also.