His mouth suddenly very dry, Dennis swallowed a few times before being able to answer. “Um. I guess…the weights.”
“Great. I can show you how strong I am now.” Walking over to one of the bars, Marcy started putting plate after plate on each side, lifting huge discs larger than hubcaps with ease, before fastening them in place and standing back up.
“That’s over 1,000 pounds, Dennis. Think I can lift it?”
“Well, I…I don’t know. I wouldn’t want you to hurt yourself.”
Marcy grunted as she lifted the bar off the ground. “Get your camera ready. You’re about to be amazed.” With a huge effort, her face straining, she slowly curled the weight until reached her shoulders. She was able to complete a few more reps, but it appeared to take every last ounce of strength she had in the process.
Lowering the bar to her massive thighs, her arms shaking, she said, panting slightly, “Just think how large I’ll be when I can use this weight for a warm up. When 1,000 pounds will be as light to me as 20 pounds are to you.” Bringing the camera up to his face, Dennis started to imagine exactly that, the Marcy shown in the lens sporting arms at least 31 inches around, raising the bar over and over again effortlessly. But what if she could lift more than that? A lot more?
“Oh, should I strike a pose?” she asked, putting the bar on the ground. She flexed both arms, the biceps forming a huge peak as she smiled. Dennis thought of her curling at least 2,000 pounds, her muscles growing even more. Of being able to bench 4,000 or 5,000 pounds easily, or deadlifting twice that amount. How strong could he make her? How large would she be? And more important, would she be stronger than Sarah, or would he accidentally make her more powerful as well?
Dennis snapped the picture and watched the weights behind her double in size, the workout area taking up more and more space in the basement as the seconds ticked by. He heard the floor creak overhead and looked up, wondering if Sarah had heard any noise, hoping she was not about to come barging into the basement and see him with her best friend.
When he looked back at Marcy, she was already past 30 inches in the biceps department, her athletic top growing larger to hold her swelling breasts and wide lats. The bar by her feet had become thicker, holding over a ton now.
“Impressed, Dennis?” she asked mid-transformation a minute later, as the bar was well over 3,000 pounds and looking ridiculous with the amount of plates on it. She picked it up again and began curling it, the weight progressively increasing as her arms slowly added inch after inch of rock hard mass.
Marcy’s arms eventually made it to 35 inches around before stopping and she lowered the now 5,000 pound bar to the floor as quietly as she could, flexing the enormous muscle for Dennis’s amusement. “What do you think about that? Two and a half tons for 10 reps!”
Rendered speechless by her new body and levels of strength, his expression similar to how he would look if someone had slammed a frying pan into his face, Marcy giggled at his reaction and walked over to him. Wrapping one of her massive arms around him, she pulled him closer and they kissed. Dennis didn’t protest, but took the opportunity to explore her impossibly wide back, which didn’t give at all no matter how hard he pushed.
She broke off the kiss and looked up at him. “There’s more where that came from, you lucky, lucky boy.”
Just then, the basement door opened and Sarah walked in. “I thought I’d find you two down here.” Immediately letting go of Dennis, they took a few steps away from each other as his sister descended the stairs.
It was then that Dennis noticed…