How can I not get fat with this bad food in the house?

Hi! Well I kinda face the same problem myself. My mom makes awesome cakes n gets all sorts of fatty stuff home for me and my bro. But its upto u to be determined enough not to indulge in them. When I’m home (I stay in hostel btw), I have somethin light in the mornin-say plain milk and bread. For lunch I generally make a sandwich for myself-lettuce, cucumber, tomato-the works..And night I have a proper non-fatty meal (mayb chapathi n somethin or rice n dal). Plus I go to the gym as well. Do some aerobics. You have to make sure that u eat enough health things and whenever ur hungry have some fruit or somethin. I know its difficult-trust me. It aint easy eatin a measly sandwich when my bro is havin some chocolate mousse or somethin! But by the time I come back to college, I realise that not only do i lose weight but I also look a lot healthier! Anyway, hope u dont cut down on food drastically. The key is to eat healthy.