Okay, uh..let me just you know…enlighten some people
Being 3 years older than someone doesn’t mean a relationship with that person is illegal.
Pedophilia is when a minor is in a relationship with somebody who is 6 or more years older than them. Besides, once Marinette is old enough and decides she wants to get into a relationship with Luka (as adults) it’s not illegal. In fact, my grandfather and grandmother are 9 years apart! My grandmother was 40 when she got married and my grandfather was 31. No, it’s not illegal, it’s just rare