It wouldn’t be a monetary victory to sue her,
it would be a legal statement of her dishonesty.
Understood - but her interactions with the school, including currently unpublished claims or accounts, could figure into making the evidence in a potential second lawsuit overwhelming. If she has no monetary resources to lose, then I would speculate she would have no issues trying to exclude or destroy any evidence in her communications with the school.
Again - just using my understanding of people to puzzle through the situation.