was on the bus with DD and DH. Bus was half empty.DD and DH were in buggy space. I sat behind them,mindful that I was in priority seat for elderly/disabled,but there were 4 others and i'd move if required (DD has SN so i hope I'm sensitive to such things).↲ An old lady got on. There was a clear seat beside me. She didn't sit on but stood there looking at me as if I were vermin and said 'these seats were meant for us.' I said 'well there's a seat there and if anyone needs this one I'll give them it.' then i couldn't help it and said 'they are priority seats,not noone else can ever sit there seats'.↲anyway,i just feel a bit mean,was i harsh?DH thinks she was just looking for a fight. There was an empty seat for her beside me. Was IBU?