Mark was in deep thought, trying to figure out what he would do now. He had Aidan at his mercy, could fulfill any dream he had by changing Aidan to fit in. So much possibilities.
Aidan watched Mark sitting there thinking, and could do nothing but remain silent and frozen in place. He was completely helpless.
Finally, Mark decided on a desire he had for a long time. He was an only child, so he wanted a sibling for years. But what was even better than a younger or older sibling? A twin to himself. He could make Aidan his identical twin. He grinned at Aidan´s shaking form.
Aidan had a feeling of something very bad would happen after seeing Mark´s grin. But he had no idea what exactly.
“Aidan, as much as I like you for being you, I always wanted a sibling. And with you, I can not only get a sibling, but a twin brother. So, Aidan, you will become my identical twin brother, only a couple of minutes younger.” Mark said with his wide grin still in place.
Aidan looked a mix between shock and happy at Mark´s command. Like Mark he was an only child, and he too wanted a sibling. But why must he become an identical twin to Mark. But he couldn´t voice his opinion without being able to speak.
The first thing to change was Aidan´s age. As Mark was a bit then a year younger, Aidan regressed a bit. At the same time, Mark was taller but slimmer than him, and both applied now as well. He grew around a foot in height while his weight dropped around forty pounds.
The next thing was his skin. He was by far lighter skinned than Mark, so his skin started to darken from olive white to a satisfying light brown like Mark had. Aidan felt his hair getting a bit thicker and longer, and turn back to black from what Mark had changed it before. And, unseen by Aidan himself, his sky-blue eyes turned into the mint-green Mark had.
Then, the changes moved around his whole body. Aidan´s arms and legs became more defined, his hands turning a bit wider, while his feet seemed to shrink a bit, if his dropping socks were any indication. His formerly a bit round stomach, now a fold of to much skin, turned straight again, flat and defined, a bit of a six-pack forming from his chest.
With a mental yelp Aidan felt his cock grew bigger, his balls swelling, filling his underwear more and more out. His ass had also gotten better defined, and now he looked just like Mark.
Mark himself had watched Aidan change, and looked quite satisfied with the result. “You look great, Aidan. Want to see yourself? You are allowed to move and speak again.”
Aidan quickly turned towards his bedroom, moving over to the mirror there to see himself. Yes, he liked his new body. He turned around many angles to see himself, touching some parts, finally dropping his now tight underwear.
“And, do you like it?” Mark asked. He had not moved from the laptop, typing something in while he waited.
“Yes, I feel great, and I love this body. Thanks for that, Mark. I must say before the change I had begged you to not change me, but I like it more than my old body.” Aidan explained as he returned to Mark, still naked. He had nothing to hide, as Mark looked the same. Even the small part that screamed in embarrassment normally was silent.
Mark looked at him smiling. “So, you have no problem being my twin?”
Aidan answered quickly: “No, not really. Like you, I always wanted a sibling. As I said, before the change I would have said let me be your sibling, even a twin, but please let me look like myself. Now I think that this is better.” And he did something unexpected by Mark, he hugged him.
That send Mark thinking if he wanted to make his other changes or not.