That's correct. That is between her and God though.
"Father forgive them, for they know not what they do."
"Father forgive them, for they know not what they do." ...
Not entirely, in this context. If the lady's behavior is otherwise notorious and/or unrepentant, the school is not required to "forgive" her to the point of maintaining an association with her.
As I've said, I suspect (without real proof) that the school is behaving poorly, and that the woman is well shut of them. So on that point, we agree.