My father had a similar situation once in his family law practice. In this case the father (who he didn't represent) hired a prostitute to give his son (I think 13 years old) a sex-ed course. I think as far as it got was the she undressed for the kid, and he touched her breasts.

When asked either on the stand or in depositions what he thought of the whole situation, the kid replied "It was the best day of my life."

lol