Hi Everyone, I am new to this. First time ever on a forum but we're at our wits end. I have a 12 year old step daughter who has lived with us since April of 2016. She is a funny, creative, smart girl. I may not be her birth mother but think of her and love her as my own. I will refer to her as X for her privacy and ours. X has had behavioral issues right from the start. She had been diagnosed with ADD as a young child to try an account for her behavior. Multiple visits requesting further re-diagnosis were refused year after year by multiple resources with an explanation "she'll out grow it". It has only been in the last year after finally being referred to a child Psychiatrist (after begging her councilor) that we have a proper diagnosis. Her father and I are at our wits end with the constant lying, stealing and advanced sexual behavior(that is the most concerning). Examples: She lies about anything and everything, it's like breathing to her. She sneaks/steals food, especially sweets, everything has to be locked away or she eats it all in a day. She steals from her sisters and our rooms. We have had to put locks on all the doors. If someone dares to go in her room or take anything of hers it's the end of the world with her anger. Her father received a call when she was in grade 5 from her school letting him know she was showing kids in her class porn sites and discussing graphic sex. Let me add at that time X was under the care of her mother who had no interest in raising a child like her. Basically let her do whatever she wanted when she wanted to keep her quiet so she didn't have to deal with her. X's parents divorced when she was 7; the behaviors have been around since a very young age(way before divorce). Fast forward 2 years after having all electronic devises removed(tablet, laptop, phone) and she was caught "approaching 18+ males in a chat room talking about sex, pretending she was older than 12. Let me add she looks 18, not even close to her real age. She developed early and is a foot taller than the kids in her class. She had only received her tablet back 6 months ago with major parental controls on it. She was using an app called Musicly which seemed to be for kids but has a chat forum on it where she was approaching and befriending the 18+ year old males. We have tried grounding her, taking away privileges(tv, stereo, tablet, friends), rewarding her for good behavior to no avail. She just doesn't care. When we ask her why she does it her answer is always "I don't know". X will promise not to do it again but does with in days or even hours. She has allot of trouble keeping friends. Do any of you have any advice? We will do or try anything to help her(and us). Our house is in constant term oil and stress.