Just remember they are now more creative they we were. I have three teens 12,14,16, but technology has actually made it easier to know what is going on in their lives which helps me to know how I am going to handle them at that time. Hopefully if she sounds mature she will still be that way when you see her. Best of luck to yo!

I think its great that you are helping your little sister. Because I was such a hellion, I have found it an interesting challenge to raise my own kids through the teenage years. I really did not have a healthy model to follow. So, erhaps having her in your home will be a good first experience for you when it comes to your own through the teen years.

My kids are now 21, 18 and 14. I would suggest building open communication (not interrogation ha ha ha. Its a fine line sometimes) and clear ground rules and expectations--about school, friends, boys/sex, curfew and house rules/chores etc. Privileges are based on trust and not a right just because you are breathing. Spending time with the family and family meals are more important than ever. I try to spend some time alone doing something fun with my kids individually to give them the time and space to open up. Believe it or not, teens can be about as needy (in a different way) than a 5 year old. Its just more complex.