I just do not see how grounding will change the behavior. And isn't that what the purpose should be? This sort of issue is one that needs, more than anything, to be addressed by discussion.
It really doesn't matter if she is not having intercourse, she is obviously sexual (in the hot and heavy sense). That needs to be openly addressed. I think her father should sit her down and have a heart-to-heart about the male perspective. About how valuable she is and how important it is that she respects herself.
I think it is important for fathers to take a more active role than just 'you are in big trouble young lady!'. She needs to know how he feels about this, not just that he is mad at her. She needs to hear what his fears are about her actions. A father only distances himself when he shuns his daughter as a 'bad girl'. She needs his male input. He is the very first male she loved. His role, in her life, will determine her future choices in intimate relationships. If he is unapproachable, she may spend years trying to prove herself to men. Trying to find acceptance from a strong male. Not a good thing.
JMHO.
