The part of the family history that's most important is what's missing. Theirs no affirmation of her becoming a noble. According to the family history she was born a commoner and she died a commoner.
I understand where you are coming from but to me all of this honestly feels like unnecessary nitpicking that stomps on other peoples fun. We aren't talking about someone changing the results of a battle or a duel or magically claiming your character is in a region that they are not. We are talking about someone being unable to make an adventurer, who will be dead by the end of the day, into a noble due to one reason and one reason only: the one noble per island limit. I see zero harm in trumping the game mechanics in this very specific case.
