ok girls and guys...I haven't been on here in ages, but I need your advise.  Well...I'm 21 going on 22 in December and I have a 15 year old sister going on 16...and well let's just say that she's going down the wrong path.  I feel that shes trying to prove herself to a very slutty friend....like...she's trying to proof to her friend that she's just as bad as her, and she's copying what she's doing.  For example: She's staying out late, she comes home when she wants too, she thinks that she can do what she wants to do, she has noooo respect for her mother,  and I have a fear that she's sleeping around with whoever the **** walks by her.  As an older sister I'm scared that she's going to end up preggers or with an STD at a young age, cus she's the type of kid that acts before she thinks of what she's doing. Well my question is... what would you do if you were in my shoes?  I know that many of you are older than me and have children...sooo that's  why I'm asking for your advise.  In other words I want to know what you would say to a girl of her age to make her realize that what she is doing is not right.   I feel that I am the one who is raising her, cus I feel that my mom has given up, and I don't want my little sis to **** her life up cus she feels that she needs to prove herself to some slutty **** that is worth nothing! I really need your advise, since I feel that I'm the only one trying to get her to go on the right path, and I have no one elses support on this...so what would you do?