Last spring my older sister and her husband were killed in a car wreck so I became sole legal guardian of my 17 year old niece and my 15 year old nephew. Well my niece has adjusted really well for the most part however my nephew has not he is out of control. He is drinking smoking crack sleeping around with much older women and skipping a lot of classes. The kid is brilliant but he is destroying himself. His sister has tried to sit him down and talk to him but he just won’t. I don’t know what to do. Can anyone help me? Advice?