Bob went to grab his phone to find potential people to wear Ryan and Carter. He stumbled as he crossed the room. Erick was being relentless in his quest for cum, massaging his cock better than any pussy he had ever fucked. He half-sat/half-collapsed onto the bed, moaning loudly as the jockstrap gyrated against him. He came hard, breathless from the intensity of the weird pseudo-sex.
"Whoo." Bob said, panting. "Haven't cum that hard in...ever, I guess. Good job, Eri-ooooh."
Erick had given him a small break, but now the jockstrap was even more determined. Bob had underestimated the cum hunger induced by the spell. Being so close to it's craved food source but still being separated by the condom was sending Erick into a frenzy.
It was after Bob's fourth orgasm that he noticed something strange. He felt a tingling sensation, and he could tell Erick wasn't quite as cock hungry. He gasped as he realized his mistake: the condom was full, and his cum was leaking out the bottom. He frantically tried to reach inside the jockstrap to save himself from being drawn into this dangerous game, but Erick tightened his arms and legs, making the waistbands so tight that Bob couldn't slip a finger under it. Bob was helpless as Erick wrangled another terrified orgasm out of him, and felt totally helpless as the jockstrap fed on the condom's overflow. He felt the magic begin to affect him, making him just as susceptible to change.
"Let the games begin." He heard Erick think. "I think you'll do nicely as a..."