Even though you were bewildered by the fact that your little brother had just grown into a tall muscular stud, you couldn't figure out how to ask him about it...which was weird, because on any other day you would have been yelling and go crazy, but today you just simply accepted it. You were still stunned and surprised, but you can't seem to make something big deal out of it.
"Hey bro?" Alex snapped you out of your thoughts. "Are you going to put some lotion on me or not? I'd do it myself, but my muscles get in the way or reaching all those tough spots."
Geez, was Alex really that musclebound? Instead of freaking, you took the bottle of lotion and squirted some into your hand. "Okay Alex, turn around so I can get your back." You told him.
Obediently your brother turned around, exposing his broad muscular back to you. You were amazed at how defined and muscular his back had gotten, but shrugged it off as you began to rub lotion on it. Looking at it was mind blowing enough, but touching Alex made you realize that those muscles were real. Alex's body was firm to the touch, with a bit of warmth. Privately you had hoped this was some sort of weird dream or that Alex was actually some sort of robot, but it all felt too real.
As you rub lotion on his back, you suddenly noticed you seemed to be using the lotion up a lot faster than you should. As you looked at Alex's back, you frowned. Was Alex....growing again?
The back, as broad as it was before, seemed even broader now. Firm muscles were visible under his skin, and his light tan only accentuated it. His shoulders were capped with some sizable traps and deltoids, and his lats spread outwards.
"Why'd you stop?" Alex asked.
"Oh, uh, just thinking about how big you've gotten." You said out loud.
Alex gave a short laugh. "Yea, and I'm still a growing boy!"
That was the understatement of the century. Privately you wondered how Alex could be growing. He wasn't eating anything right now. "Alex, can you turn around so I can get your front?"
"Sure thing bro." Alex did as he was told. As you looked at his front, you couldn't help but be stunned by how big and developed he was. His chest stuck out and his abs were really defined, and his arms and legs had a definite thickness to it. Once again you recovered quickly and returned to the task at hand. You begin to rub lotion on his arms. As you did, you could feel the bicep and triceps swell underneath the palm of your hands, pushing them apart so you could no longer reach around them, even with both hands on it! The forearms thickened and swelled, cords of muscles forming under his skin. When you applied the lotion to the other arm, the same changes occurred until he had two very big, very powerful looking arms.
Next you moved onto his torso. Like his back and arms, as soon as you put the lotion on his chest they began to visibly swell before your eyes. The more lotion you rubbed on, the bigger and fuller they became, pushing back at you. When your hands brushed his nipples, Alex breathed in sharply, causing his chest to jump out in size. "Sorry, a little sensitive." Alex chuckled. Your hands moved down to his abs, and as your fingers traced the outline, they became deeper, more shredded.
Finally you got to his legs. When you applied the lotion on his thighs, the quads grew bigger and fuller, soon filling up his swim trunks. His calves also inflated bigger, becoming the size of softballs and looked like they could swim for hours on end.
Finally finished applying the lotion on your brother, you stepped back to get a good look at what you've done. Alex had retained his height from his last growth spurt, but his body had still gotten a whole lot bigger. What was once your small and skinny kid brother a few moments ago was now a huge musclebound bodybuilder that looked like he could take on any Mr. Olympia title! Still at a little over 6 feet tall, Alex was now sporting a 300 lbs. physique that made you look puny and weak. his pecs were like steel plates jutting out of his chest. His 8 pack abs were super defined and ripped. His arms must tape at least 22 inches around, cold! His shoulders were so wide and loaded with big traps and delts. his legs were so thick, you were actually comparing their size with the size of your waist!
"Are you done yet?" He asked, seemingly unaware of his sudden transformation.
"Y-yea, I am." You replied somewhat numbly.
"Cool, now I can go play!" He turned around and began dashing off, kicking sand everywhere with his powerful legs.
Your mind as racing as you tried to figure out how this was all possible. What was causing this tremendous growth in your brother? as you recalled what went on during those growth spurts, you think....