Drinking coffee with cream helped my sugar addiction. I used to put 3 teaspoons of sugar in each cup of coffee, now I have no sugar in my coffee, and it tastes even better that way. So if I get a sugar craving, I'll just have a cup of coffee, and that tends to kill it. It works with tea, too.
Something else that helps is that when I'm getting a sugar craving, I'll fry up some bacon (sometimes with an egg or two) and eat that. For some reason the salty taste of the bacon helps the craving to go away. And it also helps to fill me up so I'm not hungry and don't care about eating something sugary anymore. And we have a whole bag of white sugar in my house because my husband hasn't gone Paleo/Primal. But I'm never tempted to touch it.
If those things don't work for you, maybe you could ask your mom to hide the sugar or put it in a lock box so you can't access it?