I am really struggling to decide what to do in a situation.
My DD has had a friend since early years, her mum I’ve also known quite well. She has always been a nice little girl, but did always have something to prove. In y7, she has completely turned into just a really unkind, attention seeking almost caricature of a mean girl. This is affected my own DD in that she likes to cause drama and other people involved in the drama and turn people against each other, which she did to my Db including sending her non stop messages one day with random allegations ‘like I heard you said x to this person, why did you do that’ etc etc why are you lying etc and despite my daughter asking her to stop messaging her, she just didn’t stop so we blocked her. I also found out, things she has sent to other people in the year, including voice messages, where she’s shouting f off to people and saying that she wants them to go away etc. just really unkind and targeted behiour. Also heard about really bad behaviour in the classroom and again almost silly levels of back chat.
her mum was fairly strict previously and I am sure she has no idea what’s going on and I actually feel concerned about this girls behaviour HOWEVER I feel really lost with senior school and what is normal and not especially with y7/8 girls. I feel a lot of advice at this stage seems to be not to get involved, but I feel really I should tell the mum the behaviour I am seeing? My daughter is also pretty well behaved and tells me everything which I know (from my own experience of being 12) is probably quite unusual!
is this normal levels of behaviour?