I had an incident that took place over 15 years ago in my neighborhood involving 3 kids and 3 families that all live with in 200 yds of each other.
It all started with one girl did not like following the group of three and got into a fight (not physical) about who should be the the leader.
Now I saw this as something That I should not stick my nose into (nothing good happens when you do).
So the 2 girls have an outright war with each other (power plays) and the parents of these (good friends) girls were also friends.
We all took vacations together, ate together and generally spent a lot of time together.
One parent decides it is time to confront the other parent to try to settle this problem (big big mistake)
Words get exchanged between the Parents feelings are hurt and the end result the girls were friends again and still are and the parents do not speak to each other now it is over 15 years ago.
I was a parent of the 3rd wheel (Boy) and stayed clear, but my lack of action was perceived as taking a side.
They (my son and the girls) are good friends and we still have a block with a DMZ.
What I learned from all of this was that relationships are at times very fragile no matter how long you have had them.
Take care of them
do not abuse them, for they will go away
if no little communication exists,
do not think of the worse possible scenario of the reasonable explanation,
do not jump to conclusions, they are usually wrong
that is the end of my story.