Replying to Skiing Could be done for me this year

My parents are geting suspicous of me smoking weed because my sister keeps telling my parents I do because of what she hears and school. SO they have no real proof , and shes a junoir btw. So whats should I do I love skiing way more than weed. Should I quit and no risk it or what? they bought the equipment btw too so yes they do have the right to take it away. Im really in a pickle NS so could you please give me some serious responses