I thoroughly enjoyed watching this scene. Keep in mind guys, that David has told us that this is a "fantasy" site, and we shouldn't take everything that is said and done so literally. We know that Torin and Steve are real guys and their situation with the fire, and the rooming together is true, but the rest is a porn video.
Torin was clearly acting the part of a somewhat homophobic straight boy, but if he is truly a homophobe, why would he have gay friends, who lead him to the site? And why would he agree to be flown to Florida with Steve, knowing it was to film gay porn, and then spend the week and be fed and housed by David? And remember that the guys go through a run through before the actual video is shot. That is where the still shots are taken, so the general outline of the scene was presented to Torin and Steve before the real shoot took place.
As Slim pointed out, the amount of money paid to the models is not necessarily what is said on camera. When Torin denied Alden his $100, it was with a smile and a twinkle in his eye. And as Jay pointed out, if Torin was so repulsed by what was going on, why was his big ol' cock so hard when he removed his pants?
Alden is a real cutie and a perfect foil to be used with straight guys. I do look forward to Part III, which will obviously feature Alden getting fucked. I just hope that Steve can stay hard enough to don the condom and fuck our pretty blonde gay boy.
Overall, this was an excellent episode, (in my humble opinion

).