'do n't - ' his lip split against his front tooth , simon 's knuckle behind it , and he fell backwards on top of his mother , who was draped over the keyboard ; simon threw another punch , which hit andew 's arms as he protected his face ; andrew was trying to get off his slumped , struggling mother , and simon was in a frenzy , pummelling both of them wherever he could reach - 'do n't you fucking dare tell me what to do - do n't you dare , you cowardly little shit , you spotty streak of piss - ' andrew dropped to his knees to get out of the way , and simon kicked him in the ribs .