She buys it herself with her disability. I don't buy any of that stuff. I workout 4 days a week and buy my own food/protein etc. I am ripped to the bone and in great shape. A couple of people asked me how come I am so fit and yet she is overweight but i've tried explaining stuff to her, offered to take her to the gym with me, what more can I do?

We live together but eat completely separately. She has one cupboard for all her junk and I have my food seperate. But mostly she eats out at places like fatburger and mcdonalds.