Asalam alakum ruhtimillah barakatoo, i have a younger sister of 21 years old, we still live with our parents and she is constantly bringing shame to my parents(who are very pious Mashallah). She has gone astray years ago, cocaine and alcohol and drugs.i tried everything, but I keep hiding her condition because i dont want my traditional parents to have a heart attack or grieve any longer, im scared she will grief them so much that they won't be able to handle it. Please tell me what i should do. (telling my parents is out of the question because they think she is clean from before but she has gone back to her old ways, i Cant tell them anything because of their health. Help?