Sorry, did you just equate a claim of cheating to a claim of rape?

had sex guy just turned 18 girl was 15

So, statutory rape. Got it. Parents exercised their legal guardian right and left it to the courts to decide whether it was permissible or not. Glad you found out how the system works.

So no the court of law is literally innocent until proven guilty

Now, by your own statement here your friend that had sex with an underaged girl is guilty. Thanks for playing your own stupid game. Enjoy your stupid prizes.