I picked up the kid at school, took her home and watched as she took the pregnancy test; she is NOT pregnant, thankfully. I did have a long talk with her about her behavior, what is causing the behavior, her relationships with her parents and her peers, the risks, the lack of benefits for a 13 y.o., etc... She was not being coerced, but nonetheless, the behavior is of serious concern.
Obviously, the problems that this girl has are extensive. There was a great deal of crying and not enough opening up on her part. I told her that I would be calling her mother and suggesting a therapist. The conversation with the mother was difficult because I promised the kid that I wouldn't discuss the details of our talk. Mom clearly knows something is wrong, she took the name of the therapist and thanked me for being there. I will follow up next week with both of them.
On a side note, I really don't want my daughter spending time with this girl. DD is leaning towards that as well. I'm not sure how that is going to go over as time goes on, we'll see. My DD has lost respect for her friend and doesn't know how to handle that yet. I am VERY proud of my DD; she really assessed the situation well and did the right thing.