I think the girl was stupid for doing that in a school restroom. I’m not even going to address the homosexual part of it. Why give it more attention.
I think the parents of the 18 year old were negligent in their duties as a parent. They knew about the relationship and surely they must know the law.
Right before my son turned 18 I made him very aware of this—I printed him the law and showed him stories of boys charged over this.
I also always wanted to know that the parents of the girl he dated approved (if they were even a year younger), even before he turned 18. It just makes sense in today’s world.
The school has a responsibility, too—they can’t have kids having sex in the restrooms. That would leave the school open to all sorts of legal issues.
The girl was wrong and her parents failed her. It is as simple as that to me.
Better yet, let your kids know they are not to be having sex before they are 18 and while they live in your house.