You don't have to thank me, I'm the one grateful for the experience and your reply is a display of gratitude in itself.
That said, my eloquence must be failing me, because I see that you misunderstand the issue I have with that scene. I'll try again if don't mind.
On day 2 the way Mizz speaks about his interest in Rael and his plans to go slow with him, it can be easily read as a declaration of a beginning of a relationship.
And those usually come with an expectation of being an exceptional arrangement, and not a "I'll tell you how special you are to me and then turn around and blow someone else".
So, the way the scene at the observation deck reads after that is that Mizz had consciously betrayed Rael's trust and Rael just did nothing about it. He even apologized about something that wasn't his fault like a lemon - the possibility of getting caught is a big part of having sex in a public place, it was Bromm's and Mizz's fault they got caught, not Rael's fault for catching them. Play stupid games - win stupid prizes. Batman couldn't beat an apology out of me there.
And regardless of that, what Mizz is angry about is irrelevant, because he just lost his right to be angry. He betrayed Rael's trust and he should not be allowed to make this about Bromm or himself.
Again, I'm not daft, I realize that this is not your intended read, but it's a very possible and obvious read from where I'm standing. Other people will see things this way too.
And replying to your suggestion about playing things differently - no, even if I chose the option to stay quiet and spare Bromm's feelings at the expense of my own, I would NOT want sloppy seconds after him. And yes, the player can choose to not receive a blowjob there, to Mizz's brief surprise, but you did not put it there for the reasons I would pick it for, so it's irrelevant in the context of our discussion - it's just Rael being shy, not Rael being angry.
So what am I suggesting?
The easiest(and also the worst) way to fix this is to avoid this read completely. Rewrite parts of Mizz's dialogue to make sure he beats the player over the head with the fact that there's no exclusive arrangement between them, and he will lift tail whenever he wants for whomever he wants while they're flirting and he's telling Rael that he is so special. With a second chance for the player to block Mizz's romance by saying that is not acceptable to him.
The better option(though not for your free time) is to lean into this. You stumbled into this accidentally, but this is good drama, and drama sells - this could be everyone's favorite scene because conflict is memorable.
(for example, Dawn Chorus fans love-love-LOVE the Axe Murder ending, even though it's a bad and non-canon ending, it's simply exciting and memorable BECAUSE it's a bad experience that's meant to be be a bad experience)
What I'm saying is that even if it cuts off Mizz's romance option, you should allow the player an option to make Rael be hurt and angry, let him dig his heels in and tank his relationship with Mizz. This is a game about relationships, yet we haven't had any opportunities to lower our scores with anyone yet.
P.S. I'm retracting my notion that Rael is so different from a modern day person that he is allowed a special outlook on the situation - while talking about his Punk years, Rael mentioned people in his gang breaking each other's heart, so an expectation of an exclusive relationship is not something out of the ordinary for their world or him personally.