"Are you trying to protect my future? or the position of headmaster? probably both right?"
Pff hahahaha, it is neither, she is just stuck in family drama, and was using you as a tool to annoy her brothers!!
It wasn't even to prove a point, or to win against her sexist family, she already accomplished that by herself when her dad made her headmistress, no, all this shit she was doing was out of pettiness, just her being a sore winner trying to ruin her grand daughter just to annoy her brothers, who probably don't give a fuck about any of this anymore, since they already lost decades ago