I doubt Andrew knew she was under age in that state. I only know because I saw something on TV about a girl having a sexual relationship at seventeen and her fella getting into trouble. In New York the age of consent is 17. It's all very confusing but Prince Andrew wouldn't be prosecuted for that - if that happened a whole heap of others with much higher positions would have to go down too.
If Prince Andrew was knowingly involved in, say, trafficking (which nobody has suggested ), he wouldn't get away with it. Gone are the days of royals, aristos, archbishops and politicians being untouchable. I'm not that invested in this but will wait and see what happens.
Like SweetPea I wonder if GhislaneM will have an accident. There must be so many scared of what she might say. On the other hand they could spring her &she could go abroad with a new identity. That's me being fanciful, would make good film.