Is it illegal for a 14 year old girl to be dating an 18 year old?

A 14 year old shouldn't be dating a 18 year old because it ageist the law. And anything can happen to them and if u know that a 14 year old is dating a 18 year old u should do something about it not just let them date because. You can go to jail to if u don't tell no1 and the cops find out about it. Because under age dating and like a said anything thing can happen. If u know an under age dating and u wont tell then your ingirent. And enmutchour abd if the under age kid gets hurt and u know about it u cab be charge too for not doing anything