Time to take away her phone and talk to her about her behavior, I hope you mean. Thirteen year old girls don't send lewd messages and images unless they've been primed to do so by someone. It can even be a sign of sexual abuse, or of personality disorders. Please get her into a psychiatrist that focuses on sexual/social issues, or at LEAST some sort of psychiatrist. Getting her in with a therapist would be a good idea to, as would getting her to pick up some sort of expressive therapy- dancing, sing, drawing, painting, writing. Something like animal therapy or swing therapy might also help. Also, examine her behaviors- does she avoid certain people or certain types of people? Have her eating or sleep habits change? Lost interest in a former hobby? Picked up a new hobby and spend unusual amount of time on it? Been irritable, easily angered, starting multiple projects at once and not finishing any? Take notes of those kind of things and take the notes to any pysch doctor you are considering. If she's behaving erratically, don't bother with the notes or even getting a pysch referral, just take her to a Mental/Emotional/Drug Crisis Center, and have her admitted. It will probably make her angry at you, but if she is having issues beyond warped views of the acceptability of what she's doing, a CSU is safer for getting her on medicine. Also, sit her down and explain that what she is doing is not only illegal, but dangerous. Tell her that it's very possible that every box she sexts passes her picture on to two other people, who pass it on to two other people... You get the drift. Also inform her that she has no evidence that all of the "boys" are not: 1) Grown Adults 2) Not male 3) Both. It's also quite possible that her image will end up on the internet- if it hasn't already- and could lead to her becoming a victim of many cruel acts. More specifically, people use nudes -or photoshop the image of the woman's head onto the body of another woman's naked body- in order to get revenge on someone or in order to amuse themselves by posting the image(s) all over the internet and even in physical locations. Some issues that this leads to are: sexual harassment, sexual assault, sexual battery; emotional, mental, and physical bullying. Suspension, banned from school events, or even expulsion from school if the other students behave in an unruly manner in order to bully the victim. (Yes, that's an actual thing that schools do instead of punishing the ones that are the actual problems! I Finally, give her the legal breakdown of it- not only could she likely be charged with creating child pornography, but she could also be charged with distribution of child pornography. If she's been receiving nudes from boys, she would also add possession of child pornography charges, if they didn't already charge her with it for her having pictures of herself. I hope some of this was helpful and that things go well with helping your doctor and yourself help her. Remember: be firm and direct, but not confrontational when you speak to her, remain calm, and she'll be more likely to listen. Don't do it when she's trying to do something or has plans to do something soon. And look up information on Crisis Stabilization Units near you, find one that has good ratings and takes your insurance. Once you do, talk to someone, and get a list of things they would let her have, policies on electronics- and see if you cell company can make it so she can only contact certain people- and get a "Go Bag" ready for her. Having clothes that are hers and meet the unit standards will help morale while she's there (pack extra underwear, socks, bras and LAYER UP- they are very cold) soft back books are usually okay, as are coloring books. Some permit comfort toys and earplugs. They usually provide daily hygiene needs, but hair brushes and combs are NOT allowed. Some CSUs will let you bring small bottles of your own bathing products. Also, feminine hygiene products are a good idea too.