There is very strict teaching on this point. Matthew 18 tells us that we must go to that person first then if they do not listen take one or two more. It seems like this counsel was followed, but for you go tell someone else after all is said and done and the person has stopped it would be against what Jesus said. Gossip, tale bearing, backstabbing in all its forms is a no-no. If we have ought against any we are to go to that person ALONE, and not noise it abroad to anyone unless the counsel is not heeded. I have been living this problem for over 5 years. 5 years ago my daughter told my son something and he hasn't spoke to me since. I asked my daughter what she said and she would not tell me, I have tried to communicate with my son but he will not write, call, e mail, NADA. I told my daughter I do not want to associate with her any more because if she feels that talking behind my back is okay, which she admitted is the case, then I have no idea what she has said to those whom we have as mutual friends. Satan was the first back stabber. He convinced 1/3 of the angels to follow Him against the wishes of the God head. He spread rumors behind Jesus back in order to convince the angels.