I am a single mom, of a 15 year old daughter. Recently, my daughter has gotten a senior for a boyfriend. He's 17. He drives.  
 
I have a problem with my daughter driving with a 17 year old. I have been in several accidents, and want to avoid the teen/teen driving thing for as long as I can. I've heard statistics that recommend that teens should not drive together. However, as I thought that was my problem, I've found out that it isn't the only one.  
 
Before my daughter was able to go anywhere with the new boy, I insisted he come over to meet me. Even though she didn't think that was necessary, I stood my ground for once. He seems nice. I the two of them alone in the living room, so that they could have at least a little privacy (at the request of my daughter). When I came back in the room, he was sitting the couch, and she was laying across him, watching tv. The next time I came in, all the lights were off, and I saw them both scramble and jump up from the couch as I walked in. I was furious, but waited till the boy left before confronting my daughter. I told her it was inappropriate and she was disrespecting me in my house. I told her that I know I won't be able to watch her 24/7, but when she's in the house she needs to respect me. I wanted to flip out because I find it totally wrong and disgusting, and I know that's unreasonable, but as a mother, that's how I felt. I am trying to deal with this reality though. So, even after telling her this, the next time he comes over, she goes in her room with him, Again, it's highly unappropriate and unacceptable so I'm asking for advice. How should I explain to her that it is unacceptable, and how can I enforce this rule, without making her never want to spend time here? I would much rather have her here than at his house, where I have no idea if there's any type of supervision. HELP!! I want the right words, because I seem to always SCREAM my way through these problems and I'm sure that's just driving her away. 
 
THANK YOU!!