My oldest nephew, 10, is constantly bullying his younger brother, 8. It's physical and mental, for example the older one will start a game of wrestling and when it becomes too rough for the younger one the older one will whack him, make the younger one cry and have a giant smirk on his face.
He also constantly undermines him, saying he's rubbish at everything.
Has anybody got any advice? I have an older brother and I never experienced anything like this. Their mum has a younger brother and I know they never got on as children so perhaps that's where it comes from.
Any help grateful for.