Here, I'll start at the beginning. I'm an officer of the law. My job is to arrest people who break those laws. Technically? Your boyfriend - and apparently your brother - have both broken the law by having sex with someone much younger than a legal adult - namely you. That means that I? Would have to put them in jail. However, because you're not strictly mortal, those laws don't really apply to you any more. And so? I don't have to arrest anyone. Yet.