I would rather have someone with an old OUI than a history of porking the underage.
While technically a minor if she was above the age of consent, which according to a writeup of this elsewhere I found she was, then why are we worried about it? People above the age set by the state to consent to such things should be able to do what they please yes? The whole corrupting a minor thing reeks of "He didn't break a real law, we need to get him with something" especially when it comes with lifetime firearms prohibition.
Bad enough when peoples lives are ruined over a fake rape allegation pushed by the parents of a consenting girl, or statutory rape nonsense where someone winds up a sex offender because he had sex with his high school girlfriend and both were under age of consent.