lolwtf
Just fuck the bitch. If she tries to do any shit after claim that she can't get you for anything. The average person probably thinks that two people as long as they're under 18 can have sex and don't even know the nuances of the legal system. Furthermore, she may not even try that route.
And what the fuck at people acting like he's some sick pervert. IT'S 4 YEARS, ARE YOU KIDDING? Is a 44 year old who has sex with a 40 year old a pervert? No. Quit being morons, and OP just needs to fuck her.