As a 17 year old 9th grader he is 2, possibly 3, years behind depending on when his birthday falls. He’s either a real bad boy, which may have attracted her, or has an IQ of 80, which makes him easy to manipulate. In any case shes gonna spend a few years in Lesbianville which she might not like.
She ought to spend lots of time behind bars
I agree with your analysis