I've got one from decades ago.
My older brother was about 18 and going out with a girl of about 16.
It was pretty short lived as she seemed to be a bit spoiled etc. and they were only teens after all.
My brother was the one who ended it but girl seemed to think Mum was behind it.
Mum wasn't but she had asked to girl to help bring in washing during the rain when she stayed over at our house one weekend as mum was in the middle of something when rain started.
This was apparently a criminal act to ask someone for a bit of help so girlfriend moaned to brother (who I think had got rather exasperated by her anyway by this point) and he ended it.
Apparently this did not go down well.
Next thing, her little sister phoned my Mum and castigated her for being the cause of all this! Little sister would have been about 14 and mum would have been about 45!
That didn't go down well either.