I will pray for her and you so God will give you strength. My adult brother (who was saved and a Christian), got into the wrong crowd and had this problem. It finally took his life in 2008 (he was 28). My parents and my siblings always let him know we were there for him, but the more we pushed the more he pulled away from us. So we just prayed, and we found peace then and we find peace now that no matter what he was never alone and always had God and his family (and he always will).