I'm sorry OP, wow, so sad... parenting is so hard. Go to a doctor and have them explain all the STDs out there maybe. then maybe have her take the GEDs, get out of school and then get a full time job. Tell her that she has to live on her own if she won't live by your rules. The other thing you might consider is moving to Africa, you could all learn about AIDS and help the children there. There was an article about an English family that did that because they felt their children were growing up too fast and were too materialistic. I can't find it right now, but it worked. The children learned empathy and actually changed, there was a picture of one of the daughters holding an AIDS baby. They were younger children though and they weren't sluts yet.