As runt looked on, he saw Thomas's will change, become more obedient. Smacking you on your thick back, he says "sick em you little prick dick!" Your about to punch him in the jaw and send him across the room, when your dick feels different again. Looking down you see it's changed, a plastic syringe full of steriods now. "What da fuck you do!?" You shout at him, but just as your about to beat him to a pulp with your thick hands a lust takes over you.
You seductivley start walking over to Thomas, already in a trance, and moving like the roider alpha male you are, begin to dominate him. He stands there, pulling down his gym pants and boxers, and bends slightly so you can move in on him. With a rage between being roider out, and a lust to juice him up as much as possible you stick your syringe dick into his body. He moans faintly as your needle is now stuck in his ass, and the liquid begins to enter his system. You start humping him like a dog with a leg, each pump bringing more juice through the syringe into his now inflating body. Filling up with ultimate pleasure you let out a deep roar, sounding like a wild beast. Runt just stands there saying "this is fun! Look at you go my roider!" Not knowing what he meant, I turn between a hump and moan, and wink at him.
What runt saw was Thomas slowly inflating with muscle with each pump, becoming bigger and thicker with each release of the syringe. Soon the two of them could be twins with all the muscle packed on his body. Even the roid guts were equal, but his roider just kept going, making Thomas swell even bigger now. "I oooh! Feeeeellll aaaah! Heeeeaaaavyyyeeeeeee!" Thomas scretched, as the roids began to make him look more cartoonish. His neck had already been thick, but as his traps and shoulder took over, it became none existent, becoming one with his head. He tried to turn his head bulgur it was pointless now since the muscles made it impossible. His chest and pecks swelled out, becoming massive with meat and width, making his arms look like he was trying to flap like a bird as he kept getting humped. Soon his biceps swelled out wider and thicker, making his stance more like he was doing an eagle spread. With another moan he cried "whaaaaaat ooooh! Is haaaaaaaapening toooooh meeeeeee!" His voice sounding like a baraton from an opera now.
"Runt was enjoy this as much as I am!" I laughed as I began pumping harder into Thomas, letting out all my rage with each pump. Soon I began to sweat as I moaned with each force. "Runt you wanna fuck later?" I said while I moaned in pleasure. "No thanks juicy juice! I got enough thickness!" And with that I focused on my ultimate climax. Runt just looked on with a bag of popcorn as Thomas's legs began to swell out, his shirt now just a shredded memory of its size. His legs swelled and grew, making his standing wider and wider. He tried to walk away, but runts roider wouldn't hear of it and pushed in deeper. With a loud moan the swelling began to become to much, and Thomas stopped moving all together, his muscles reaching the point of immobility. Runt saw this and began to walk around Thomas and his new roider buddy as the meat head kept going. "Hmmm looks like your neck has disappeared into your shoulders, and op! There goes the chin as well!" Runt laughed as he munched his popcorn. Thomas stood there just moaning as his chest grew out to the point he couldn't even see his feet if he wanted too.
Runt watched as the body swelled to the point the skin was beginning to creak like leather, leather like a ball that was filling up with to much air. Thomas wiggled his muscles digits, they looking like tiny little doll hands compared to his over inflated muscle balloon of a body. His face and cheeks began to swell out from the bottom making the nose and eyes look tinier by the second. His hands stopped moving has he creaked ever louder for all the juice inside of him. With a finally victorious roar, his muscle beast let out the last shot, making Thomas start to squirt in spots, finally making him explode like a water ballon! "Bwahahahahaha!" Runt laughed as I sat back panting with satisfaction, wiping my forehead as I got out a handful of dbol to take. "Man! I need to get bigger! I'm starting to look small again!" I barked as I gulped them down, runt just sitting there laughing as he saw the mess of roids and skin splashing to the ground with a smack and sploshing sound. "Don't worry big boy, I'll make sure your never small!" He said still laughing as he patted my meaty shoulders again. I shrugged and started on my sets again.