Some points to consider:

-Even though he says he was 18 when the porn started, it doesn't change the fact that the pastor influenced him at an impressionable age and used his power and influence over your brother.

Am I suggesting that "Pastor Jones made your brother gay"? No. Nor am I debating whether this was "better than" or "worse than" if your brother had been 17, or 14 or 10 at the time.

The fact is, regardless of whether or not your brother was of legal age or what the criminal aspects of the situation were - this is someone who is supposed to be a trusted authority figure who got your brother into porn.

Without that toxic relationship, I genuinely believe that your brother would be one of the millions of people who grows up gay but does NOT become a porn star. But, because he was groomed by this guy, he likely doesn't see it that way.

Even if he had a loving, supportive environment to come out into, I still think that he'd benefit from therapy for that alone.

-If you choose not to say anything, I am guessing that until the truth comes out, you're going to get hit at family gatherings about how you're "full of sin" and "need to live a good life like your brother and his wife."

Have you thought about how that's going to affect you? Because, to be honest, if I had the pressure of keeping this a secret and kept getting shit about my sinful life, at some point I would probably lose it and say, "Yeah? Well, I'm not the one taking two dicks up the ass on camera, am I?"

Point being, it's probably going to be really hard not to think that when you get hit with the religious judgements, and you should think about how you and your boyfriend are going to handle it.

-What's your plan when this all comes out if you don't say anything? I'm not necessarily suggesting that you do spill the beans. But the reality is that even if your brother stops with the poem right now, his body of work is out there preserved for eternity and some day - whether next week or in 20 years- the odds are good that someone will discover this.

Along those lines, I would sit down with your brother and tell him that if a pastor had gotten you into porn as a teenager, he'd no doubt see it as a problem. The best thing he can probably do here is to get therapy for that, for dealing with being gay in a conservative family, and for how he's going to explain all of this to his wife and children when they find out.

Regardless, you may want to get some therapy for yourself with all of this.