Taking a deep breath, John opened the door for Chris and Mike, and then followed them far enough to block the doorway. The morning was bright, and in the time it took for the brothers' eyes to adjust to the dim light inside, John had slammed the door behind him and yelled "boys, sic 'em" to his betas. The brothers had no time to react before Alex and Hugo were on them. Hugo took down Chris, Alex was on Mike. Both of the beast men were growling: a low and guttural noise coming from deep in their chests. Mike cried out, but John told his beast men to keep them quiet as he ran out to his car. Grabbing two of the remaining three vials of beta serum. He ran back to the apartment.
When he got back, both Hugo and Alex had their hands over the mouths of the captive brothers. In Alex's case, his hand basically covered all of Mike's face. Taking the vials, John casually walked over to his betas.
"Sorry for all this," John said. "I didn't expect there to be two of you, and I panicked a little bit. Now, if you'll promise to be quiet, I'll tell Hugo and Alex to let you speak. Will you two do that for me?" Both of the prone men nodded as best they could under the hands of the beast men. "Alright, Hugo, Alex, let them talk." The betas obeyed.
Chris was the first to speak. "What the hell is going on here? What the hell are you doing? Who the hell are these guys and what the fuck happened to them?"
"Before I answer that," John said, "what do you think of them? How do they make you feel?" The question was almost rhetorical, as John had spotted the bulges growing in each of their pants minutes ago.
"I feel," Chris started, his voice filled with anger, "I feel..." his voice softened, "I feel hot," he finally finished, his eyes a bit vacant. Apparently, Hugo and Alex were starting to loosen up as well. Hugo's thick cock started to creep up Chris's chest as it hardened, and Alex's had already reached Mike's face. His mouth, it turned out, had become to busy to respond to John's question.
John popped the caps off of the two beta vials he was carrying. "That's good," he said, "how would you like to be like them?"
Chris, whose comparatively small, fragile hands were working the massive shaft on his chest managed a "yes," while Mike stopped trying to swallow Alex's rod long enough to grunt in agreement.
"Good," said John, "then drink this. Once they have, Hugo and Ales, I want you to let them up." He poured the contents of each vial into the open mouths of Chris and Mike.