I think what she didn though wrong is not criminal. The boy was JUST as guilty. Got news for you sister, high school kids are far from innocent. the boy has a trophy now of sleeping with the hottie teacher and will be proud for life.
Whether the boy will be affected by it or not or have a trophy on his shelf as you put it, it is not acceptable behavior for a teacher to have any kind of sexual relationship with a student. Teachers are held to a higher standard and parents should not be concerned that, when their kids are in school, the kids teacher will be hitting on them. Male or female, if she is guilty, throw the book at her. This can't be tolerated!!