Well, at least you have a reasonable reason... I doubt that it would stand up to the Supreme Court though. Way too tenuous, especially if she was not actually teaching them.
Actually, this would be a problem for professors in college if this stood. Seems to be rather problematic there...heh.
It is a problem even if it isn't covered by this law. College and university faculty can be fired even if tenured for having sexual relationships with students in their classes.