NC’d for this
I'm a mum of 3, twin 13 year olds (boy+girl) and a 10 yo boy. Every school holiday DS1 and DS2 are constantly fighting, as well as DS1 and DD arguing as he tends to go in her room and hide her things, they also fight constantly. He doesn't listen when I tell him to leave them alone, he goes out and also causes trouble with his friends, picking on younger children etc which he denies and says it's his friends.
The week hasn't started yet but since Friday (DS1 and DD had a training day so weren't at school) he's been misbehaving constantly, DS is also on a ban from his devices due to bad behaviour which has made him worse and he's been saying if I give them him back he’ll behave etc.
My dad has said he can go to him but he'd have to get the bus to the train station, the train and then another bus to his house and neither of us drive. His dad isn't interested as this week isn't his week so it isn't his problem as he says 
WIBU to send him to my dads for half term?