Johnny was a bit taken aback that his once proud manhood was now so small. But as the woman moaned a long, sweet sound and spread her legs a bit more Johnny decided he would do his best with what he had.
Ignoring the bells going off in his head, Johnny jumped on top of the woman and ripped her shirt open; exposing the wonderful breasts hidden just beneath.
He began to pump wildly into her, while sucking on a nipple. She screamed in pleasure, even though he (Mike) knew this was his son pounding his new, tight pussy.
As Johnny came close to cumming, he heard footsteps behind him. He tried to calm himself and pull out but he felt a strong hand shove him down and keep him from turning around.
"Let's see how much of a man you really are." Zeke muttered. He pulled out the alien syringe and held it just above the boy's hairless ass, he shoved the needle all the way in and pumped the boy full of the changing agent. Zeke was proud of his ingenuity; he had filled the syringe with the strongest agent he had in his possession, it was capable of turning the biggest, burliest bear into a stone-cold fox.
Johnny suddenly felt a surge of power and renewed vigor. He felt as though he was about to cum, and as he did he felt like he would never be able to stop.
"Yes, let your seed fill your father as you absorb the rest of his essence." Zeke said quietly.
Mike screamed out as he felt the hot cum fill him to bursting nearly. As he felt the warmth emanating from his son, he began to feel more weight pushing down on his legs; the thrusts also began to get stronger as he was bucked harder.
Johnny's calves began to pump up into muscle bulls, his quads expanding and ballooning to that of Lance Armstrong's and beyond. They had gotten so big that they had ripped his 501's. His thighs began to ache as they swelled, growing bigger and bigger; finally resting at a point that they made a pro-bodybuilder's look pitiful.
His abs began to pulse and he felt like they were on fire. His stomach flattened out at first and then developed some small divots before blowing and forming into a taut, hard eight-pack. His pecs shot out suddenly and protruded at least an inch further than his abs did. His bi's and tri's expanded suddenly, and just as his forearms grew, veins snaked all over his body. His hands began to cramp and ache as they grew much larger and stronger; he tightened his grip on his dad as he felt the itching tingle shoot across his body.
The hair on his head pulled back in and turned itself into a strawberry blonde fauxhawk. The rest of his body itched like crazy as blonde hairs forced themselves up out of his skin and into existence. When the hair stopped growing he had a nice coating of hair up and down his legs and on his arms.
His abs itched for a final time as a treasure trail formed and led its way to his cock; which was still small and pitiful next to his new gorgeous body. As the hair grew into a nicely groomed state, the changing agent finished and Zeke shoved a second syringe into his beautiful bubble butt.
"Now let the changes finish and become permanent." Zeke stepped back and chuckled as this poor human would become the newest breeder of Zeke's kind.
Johnny felt a fiery burning as his insides melted and reformed to match Zeke's alien anatomy. As they finished reshaping, the growth agent in the syringe pushed Johnny's small frame from a short 5'8" to a handsome, strong 6' even.
The syringe worked its final changes in Johnny's reproductive organs. His balls swelled to the size of baseballs and his dick suddenly shot deeper into his new girlfriend. It went from the wimpy 4" to a 24" fuck stick. He finally felt the sweet release as he shot a final load into his new mate. He was sweating profusely and slumped against her ragged body as he came down from climax.
She was panting heavily and crying too. "Son, how could you do this to your dad?" She tried to crawl away but she was too weak from the hammering she'd just received from her godly son.
"Dad? Is... is that really you?" Johnny felt a strange sensation, like he was getting a headache; but worse. His mind began to forget and rearrange things. He remembered joining his planet's academy and growing into the studly man he was now. How it was his mission to come to Earth and help repopulate his planet.
"Quiet woman." He knew who he was now. "You will stop your crying and nourish yourself as my young begins its growth and makes use of you." He willed some clothing and immediately he was wearing a pair of jeans that made him look like another townsman.
"What do you mean? Son please, you're scaring me!" She felt a pressure building near her stomach and she looked down to see herself growing at an exponential rate.
"I am not your son. I am your mate, and soon your purpose will be served." He turned and went to meet his superior, Zekehigthyok, or for short, Zeke.
"You have performed well, she will bring forth a great young. I believe this is your first offspring... congratulations on producing such a virile new specimen. She will bring forth many new generations after this. When do you plan on creating a second son?" He asked.
"In 36 hours, of course, I figured I would let her have an extra 12 to rest. After all, we'll be busy for the next few months." Johnny knew that it was his responsibility to his planet to help repopulate as fast as possible. Once his mate's body had gotten used to the strain, he would mate with her every 25 hours, leaving her only an hour of time to relax.
Johnny's father sat there, stunned at everything that had just happened. He had been turned into a woman and then fucked relentlessly by his son. And now it appeared he was pregnant; he was enjoying the sensations of the baby growing though.