Reading that quote the only adjective at issue is "whoring" the rest are subjective unless the alleged defamer is her Psychiatrist and knows that she is not. Whoring in this context would be unlikely to be meant as actual prostitution instead I'd interpret it (though the courts will doubtless disagree) as meaning "she has multiple partners outside of or alongside long term relationships". This of course is a matter to be determined by facts.
Even if it's shown that in fact she does not sleep around, then there's the question of whether that allegation defames the person in question. For example they may be widely publically assumed to have that lifestyle and so this statement would no more defame her than the allegation of lying (everybody lies).
So does she sleep around, perhaps this should be determined before the breaching the anonymity of her critic. Revealing the critics identity is punishing them before the trial has even taken place to determine if they're guilty.