Liam felt a pang of pain shoot up his arm and spread through his body. He squeezed Mark's arm tightly, feeling every muscle in his body go wild. With each passing second he grew bigger and stronger.
"What's happening to him?" Adam gasped.
Ian watched with folded arms in contemplation. "If I was to guess," he said to the others, "I'd say Liam has a connection with Mark to grow more, on account of them being brothers and Mark being the one to make him grow in the first place."
Mark screamed in agony, and the others looked at him expectantly. "I'm not about to grow, you fucks, he's crushing my arm!"
It was true. Liam's grip was getting tighter and tighter as he grew to inhuman proportions. Without the word the others jumped on him, barely pulling him away from Mark enough for him to fall helplessly to the ground, clutching his wrist softly. In a state of ecstasy and rage, Liam tried to grab his younger, smaller brother again. Drake and Adam grabbed his arms, doing their best to hold back the giant. He towered over them, twice the size he'd been after his first growth. With a cynical grin, he lifted the two teens into the air, tossing them one after the other onto his feeble brother as Ian charged into him.
"You may be the biggest of THEM, but you'll never be as strong as me!" Liam boomed. With a deep-seeded lust he grabbed Ian and pinned him against the wall, ramming his cock up his ass. With each thrust, Ian screamed out loud. His muscles began to shrink as Liam grew bigger, until he discarded the beaten down teenager.
He was breathing deeply, lust and rage clouding his mind. He found a mirror, pulling every pose he could think of in front of it, watching his muscles bulge and the veins pulse all along his arms and legs, while the others watched in fear and arousal, knowing they had to try stop him from ruining this on THEM, too.