That time u should tell her u feel very uncomfortable because this is true.
If she still trying to help that assistant lady, no matter how frenly she was, tell her to imagine when u are in the public some1 shout to u "prostitute lady!", thats how u can feel.
Seriously u can sue her eventhough the doc trying to cover her...for saying such thing that may hurt ur feeling when there is other ppl around.
Same goes to those ppl when the burse suddenly call "sex organ not working, come!"