haha, what i'd do would be, #1 IF YOUR GOING TO DRINK SLEEP AT A MATES HOUSE SO SHE CANT SMELL IT ON YOU
#2 act like an angel around the house cleaning etc, promise her your not drinking or smoking.. u should stop smoking, im hooked now n its killin me, and my tongue ring today lol is hurting after every smoke
#3 ask your dad if he minds you drinking, if he says no say to mum 'well dad doesnt mind, how about you guys discuss it.. thenh they'll fight then the loads off your shoulders