Contradictions on diet

I was just writting my work on diets and I am still thinking about the differece it makes to try to follow a path and not put attention to the info at all,I will start with my mother as an example,she lives in South America and loves to eat every time she came to visit me she looks big but only her belly and I always tease her of been pregnant,once she comes to my house I give her a whole wheat diet , also mostly fruits and keep her busy,going to the beach, the pool or just for a long walk,I have to say it is a big difference,she looses belly everyday and I force her to drink lots of water,no sweets or ice cream,so the ice cream truck does not make any money with me,I love my mother but I have to control her diet,with my husband it is amazing,he can it as much as he wants and he could it a day or at midnight with him no difference at all an never gains weight Iam honest,he never gains weight, he is working the all day as a mechanic,and does not believe in diet of no type,the diet for my kids I control,specialy my big boy who loves to eat just like my mother,he loves not only to eat ,he really takes his time eating ,my other kids is so particular and very demanding ,and its almost nothing eats at the end.