dear mark, you are such a great bro!!! hmm, for one, you can say play more outdoor games and make it FUN!! and get your mum to keep healthy snacks like fruits and rice cakes or whitemeal bread at home. use sweeteners instead of sugar and get your mum to boil your dinner instead of frying it. when she eats junk, try to get her to share so that she only eats half the calories.