At age seventeen and fifteen, what we probably have is a twelfth grader dating a tenth grader. Age of consent laws (apparently sixteen in NH) that make it statutory rape between two high school students only two years apart in age are ridiculous. Obviously, teens should be protected by law from sexual advances by true adults, out of high school and with the freedom customary for adults as opposed to high school students.
But some common sense needs to be applied in these situations, and the father seems to place none of the responsibility on his fifteen year-old daughter, who is not a child, and according to rate of maturity for boys and girls, probably near the same maturity level as the boy. Two years of age difference is very common in high school dating.
And yet, when I was sixteen, these laws were enforced by the State of New York, and they were clear, comprehensible, and didn't cause any major social disruption.
Almost every attempt to lower the age of consent in US jurisdictions fails, so the People, at least to the extent that they speak through their representatives, favor age of consent laws.
As they used to say, "Fifteen will get you twenty".
Easy to understand, it's the law.
What's the problem?
Are you male? Were you ever a senior in high school?
If so, were you not aware of the predatory nature of your kinsmen?
If not a statute, then something else needs to exist to protect 15 year old girls from high school senior boys. They are as a wolf pack with only one thing on their minds....and Mom/Dad can't be there all day to shield them.
Girls at that age can be easy pickings for them.
Which is why I have installed a highly efficient Bullsh** detector in my 15 year old daughter.
Every state has their own formula for age disparity between teens vis a vis sex. Parents and schools need to inform teens and young adults what those laws are and make sure they know how serious it is to break that law.
If the boy’s parents didn’t tell him about the law, they are partially responsible.
Ditto the girl’s parents.
Oh, I’d deal with her as well. Perhaps chaining her to a heavy object in the house would work?