I think it can be complicated..especially with girls..
Years ago one of DD's had a child in her junior class that the mother was always worrying about and was so "quite and sensitive".
She wasn't a friend of my DD's.
As the years went on my daughter mentioned a few times that she was not nice, definitely not sensitive and was very very much a different child in class to the way she behaved when an adult was around.
Not my concern or business as my dd wasn't friendly with her and it didn't impact us.
However at around age 9 this little girl had become a right little horror quietly in the class, being very quietly nasty to girls.
One day I was contacted by a parent asking was my daughter ok as she had had a run in with this girl over something nasty she had said to another child in her hearing. My daughter had taken it on herself to go and complain the child to the teacher early the next morning.
The little madam absolutely denied everything and started crying hysterically when several witnesses to the incident backed up my daughter's version.
Such was the hysterics that her parents were called into remove her.
My daughter came home and never even mentioned it....I was contacted by a parent and told what had gone on and that her daughter was very upset as she had had years of nastiness from this child.
Following morning there are 10...and I mean a full 10 parents in the school, that have decided to make a complaint about this child....
The Principal couldn't believe it.
This had been the child that had cried for two years every morning, when her mother dropped her off and was such a "quiet sensitive soul"...
Well it was all now the talk of the school, not to mind the class....
Parents were very very upset as it turns out a couple of them HAD been brushed off by the Principal years earlier.
The mother was shamed and I would say absolutely mortified...and wasn't seen for the remaining years in the school.
HOWEVER, she did put manners on her daughter who didn't say BOO to another child for the remaining years in primary.
The point is....this child was a nasty manipulative pup....who had her mother duped as much as anyone.
Funnily enough, it was her lovely grandmother who once said to a friend of mine when she was about 4.."that girl is going to be such a handful.. she's running rings around the whole family". Granny was absolutely right.
Apologies about the length..