whore in sheep's clothing
a girl who seems nice and conservative, but in reality is a slut
"I got herpes."
"What!? I thought you said you met that chick from church!"
"Yeah, she turned out to be a real whore in sheep's clothing."
"What!? I thought you said you met that chick from church!"
"Yeah, she turned out to be a real whore in sheep's clothing."