My favorite part here is that while Boston starts out playing innocent, like he has no idea, like this is all just something so easy that he did and that's over and now everyone can be happy, right?! Right!? That's all! No big deal!
But it's all a lie. Just a lie, lie, lie, lie.
This, right here, is so important. Because Ray has fully accepted that Top and Mew are in love. He has. He had to. He knows that Mew loves Top and for all that Boston accuses him as wanting to be the rebound... Ray will actually go out of his way to insure that can't happen when he outs all of this in the bar. He goes out of his way to not set himself up as a rebound.
I love how Boston changes tactics here. He's just trying to figure out what keeps this quiet and what gets Ray on his side (or at least gets him under Ray's skin so he can make this stop) at least enough not to bring this up to Mew. Boston is just trying to figure out which manipulation tactic will work. And he jumps between them so fast.
Only to realize that Ray is on the attack and that his tactics aren't working because, this time, it's not about hurting Ray. It's about hurting Mew.
Boom. The smile. The truth. Well, as much of the truth as Boston ever uses. Boston is going to drag Ray down to his level and he is going to force him to face that he is just as bad.
Boston goes for Ray's jugular every single time. He knows his weakest spot and he has no hesitation to attack right where it'll hurt the most, where it's most likely to make Ray stop and shut down.
But he really misjudged this one. He pushed too hard and too far.
And what he did here is set Ray up to raze the ground and burn it all done. Because if what he does doesn't matter and makes him evil... then he'll do it all.
Boston dug this grave all by himself and he doesn't even realize that when you push someone down to rock bottom... you have to fall too if you're gonna rub dirt of their face.