hi i am finding it hard to put some better rules into place for my oldest 2 children, they r 12 & 13, my oldest isnt to bad and does follow most things we say but my 12 yr old is totally different, he lies constently we have caught him stealing, hes always hurting our younger child and causing arguments with both oldest n youngest,he argues with both me and my husband and will swear blind that he hasnt done anything even if we have seen him do it, he is always finding the fault in everything both in people and things others do but he is perfect in his eyes, we have not been out for a while because of his behaviour he always seems to spoil it and we r stuck with how to punish him,( that sounds abit harsh ) grounding him, taking away his things doesnt work he carries on as though nothing has happened, we do have some rules but they r more aimed generally and i think we need something more direct for them and there age, and appropriate consequences , i would really apprectiate some advice on rules and consequences please!!!!!!!!!!!! i feel like im loosing control over him and he doesnt care , :(