My DC (6) can be really defiant when asked to do something e.g. go in the bath, put your pjs on, switch the TV off. He just says 'No'. I always have the battle and don't let him get away with it but it grinds me down. I work 6 days a week, super long hours and feel like I don't see him enough and when I do I'm fighting him. At school, he is really well behaved it's just at home. Is this defiance normal?