My bolding.
This tread have already covered all the pseudo rational reasons thrown up and we are now down to the values thing.
I suspect the values in question is about sex being nasty, porn even nastier and if you use it you should at least feel ashamed of it.
Then it makes sense to fire her, having her up close as a normal person could give people wrong ideas about porn actors being ordinary people.
The whole values excuse kind of piss me off, imagine if the school claimed to promote rational thinking and found it, regrettable but necessary, to fire anyone dumb enough to vote for the government who put a chiropractor in charge of the secretary of health.