Thank you for your comments. I wish I had handled it differently.
Some other details:
The mother came from a developing country, and had moved here to the U.S. two or three years before this incident. She did not speak English. Some, not all, but some persons from developing countries view these types of situations differently than those raised here in the U.S. Her viewpoint of the incident was that they were "misbehaving", both of them. It was as if they had stolen a candy bar or something. She really didn't think it was an actual crime by the Ministerial Servant, she called the elders because she thought we should know about the "sin." I remember her phrasing the incident to us as what THEY were doing, not WHAT WAS DONE TO HER SON. In fact, she seemed to view her son as the more responsible one. She was even apologetic. Perhaps because the Ministerial Servant was so limited mentally, I am not sure.
That viewpoint by the mother worked in the Society's favor, because she wanted to just scold THE BOTH OF THEM for the incident AND MOVE ON AND FORGET ABOUT IT. Just what Bethel wanted.
We were never told by the Society or the C.O. to go back to the house to talk to the victim. A married brother was asked to study with the boy, and to bring his wife along.
BF