I would say it all depend on the maturity of the individuals. Disciplining a child is a broad term, if you trust their maturity nothing wrong if someone tells your child  no, yes or go away, sit down. But again if he touches your child to discipline your child I would expect a clarification on what he thinks he is doing?  

So maybe a sharing. This can be done  in couples or with groups. Someone has the "talking stick". Each individual has lets say 5 minutes to speak on what they are feeling/ experiencing internally where the others gives them time and space to talk and they listen without reaction. 
You can make guidelines, like giving a reaction on what is said it left alone for while. You could meditate, have a moment of silence between turns. After the sharing is done you could split up, do your own thing, go for a walk. Let it all sink in so  one can observe what the others words do to them and reflect. 
Maybe nothing needs to be said because things are cleared out or maybe the next day conversation happens with more understanding of the other. You could do this sharing daily, once a week, whatever. Helps to not bottle things up.

I know this way of sharing helps in my relationships. One feels a freedom to share their inner happenings without judgment. Sharing whatever, even things that makes one feel anger, jealous, guilty, unheard, happy, etc, so to help expose the ego by speaking it out.  We can help each other grow towards more wisdom.

Good luck