Individuals in position of authority (male OR female) should not use that authority for sexual advantage. Plain and simple.
But I have another question: How were these two found out? And if she was a family friend, did the parents press charges or did law enforcement press the charges? There are a lot of unanswered questions here.
I agree if that was the case.
But my guess is that she used something other than her authority, and two, I doubt that the boy feels he was taken advantage of.