"I am once more invisible to not only Zoey but my family as well. They cannot hear me or notice the changes I make to Zoey."
He heard the spark go off and walked into the room. He looked over his sexy sister who had an amazing ass, and beautiful D cup breasts. He smiled as he brought the device to his mouth and began to record
"Zoey has a condition where her body is developing fast. Her breasts are immensely bigger than they are now, but are growing without defect, or hurting her back, however she can still feel the weight of them. Her skin is also flawless and soft to the touch. Her ass is also bigger, tighter, and perfect as well. She will also grow to 6 and a half feet tall, almost all of it going into her legs. Her body is also still growing, and without defect and science cant stop it, only when I want her to."
He let go, and heard it spark, and looked on as she started to change. First her bosom started to jiggle and then it began to inflate. Like two flesh covered water balloons. Her top became stretched as her D cups grew into E cups....then F cups, and continued to swell, then fabric started to disappear. Her top soon became a tank top showing off tons of cleavage as she swelled into the G cup range and continued to grow. Then he started to take notice of her ass as it swelled outward and her shorts soon changed to Daisy Dukes. Mom and Dad complained about her wearing those but she complained it was hot outside, and that other shorts didn't breathe as much.
You groaned as her ass swelled and swelled until it looked like it belonged to an ass fetish porn star. Then it firmed up and tightened. Thats when you noticed you took your eyes off her bosom and gasped as they were still growing, now K cups and she had enough cleavage now to make dicks disappear between them if she were to ever give a tit fuck...and still growing!
Then he noticed her changing position on the couch...as she was growing taller now! He had to resist jerking himself off but his dick was rock solid looking at the girl growing...and growing on the couch. She put up her long long legs on the table as she settled into her new height of 6'6. Also her breasts were finally beginning to slow their growth, resting on her chest at a mighty P cup.
Arthur looked on in awe at his sex goddess of a sister. He wanted to copy her look but then came up with a better idea. He smiled as he left the room and returned to his own. He groaned, remembering how sexy, and how perfect his sister was now. He brought the dictaphone to his mouth, knowing how to both get what he wanted, and mess with her a little bit.
"Tonight, Zoey is going to give into her desires and come into my room while I am sleeping and have sex with me in my sleep. I will be aware of whats going on but sleep through it. Afterward, Zoey will get really tired and return to her room...but the next day, we will have switched bodies. We can only return when I, Arthur, wish us to. While I'm in her body, it will still grow and develop as per my wishes earlier"
He was about to let go of the button, but a wicked idea crossed his mind.
"While I am in Zoey's body, everyone will be attracted to me. They will be willing to do anything for me and do whatever I ask them to. I will also be attracted to both sexes while I am in her body. I will also be able to eat what I want and not gain weight or have to work out to maintain my figure"
Later on that night, Arthur fell asleep. Zoey smiled as she approached his door and gently opened it up...her panties soaked with excitement at what she had planned to do. She had been masturbating and found that she couldn't take it anymore, she needed to fuck Arthur tonight. Arthur, even tho his eyes were closed, could somehow see his naked sex goddess of a sister walking up to him on the bed. Her massive tits were perfect and wobbled heavily with their ever increasing weight.
She gently pulled off his covers and pulled down his pajama bottoms. She licked her lips at his erection as she lowered her mouth to it. He groaned in his sleep as she gently got the cock wet with her mouth sliding it up and down her throat. He was surprised he didnt cum on the spot! She smiled as he still was dozing off and she hefted up her massive tits and straddled his side. She gently took his cock in her other hand and aimed it for her pussy.
"I cant believe I'm going to go through with this...but I can't help it. I can't believe I'm going to let him take my virginity..."
She let out a gentle moan as she slowly lowered her pussy onto his cock. He moaned in his sleep as his cock head slipped into the tight, wet folds of his sister's pussy. He moaned as his entire dick was now inside her and she was resting her hips ontop of his. She began to rock herself back and forth, moaning herself, as she held her heavy tits
"ahhhnnn....yes....I'm really doing it! Good thing Arthur is such a heavy sleeper! nnngh oh god it feels so good to have a real dick inside me...especially my brother's!"
She took her arm off her tits, and leaned down, letting the heavy breasts rest on his sleeping chest as she kissed his sleeping lips gently. Finally his body can't handle it anymore and he unloaded one of the biggest loads of your life directly into Zoey.
"Nnngh it feels hot inside me! nnngh! Wow this is what having a guy cum inside you feels liiiike!"
She smiles as she gets up, kissing your face once more as she sneaks back out of your room. She heads to her own room and climbs in bed. Gently rubbing over her pussy trying to keep as much of Arthur's cum inside of it as possible. She then drifted off to sleep, unaware she would be waking up in his room the very next day.
Arthur woke up the very next morning and yawned. He immediately noticed his yawn sounded feminine and then as he sat up, he could feel like he was being pulled forward. Looking down he noticed the mounds on his chest and hefted them up.
"H...holy crap. It worked....I am in Zoey's body"
He stood infront of the mirror, only to see this body looking back at him.
Oh yeah....this is going to be fun!