Jonathan looked down to Mary as she writhed on the bed, and the corners of his lizard maw curled up into a smile. His plan was working on the fly, being made up as time went on, but he did have an ultimate goal. He lifted the male vial to his mouth and downed it all in one gulp.
He could feel the surge of power as his muscles thickened, feel his bones stretching out as he grew taller, and feel the virility surging through his entire system.
"What..." Mary gasped as she beheld him through a fog of increased sexuality, "What did you do?"
"I took the final ssstep, Mary," Jonathan explained as he reached down and tore her panties off with a simple, quick tug. She was unable to fight him off. "Assss I increasssed your fertility, sssso did I increassse my own. We are a new ssspecciess, my love, and it isss our resssponsssibility to propagate, and perhapsss one day dominate the planet!"
Mary lay there in utterly powerless horror as Jonathan lay atop her and entered, knowing that by doing this he was impregnating her no thanks to the ultra-fertility the vials had given both of them.
"Yessss," he hissed as he pumped his hips, holding Mary in a sexual trance she was unable to break. She had created a monster, and she was its first victim. "I ssshall be King, and you the first and foremost of my Queenssss... And we will, together, create our empire. Thissss is what we were made for!"
The act of intercourse took nearly an hour. The whole time, Mary was trapped between ecstacy and agony, horror and awe. On one hand, she was mortified at what she had created. On the other, she wanted to be a part of this new lizard empire, to overrun the mammals and create a reptulian utopia. The only thing she knew for certain was that Jonathan, her lord, master and king, was a madman.
"Thisss isss good, my love..." he sighed in satisfaction as he rolled off of her and lay aside her. "Ressst now, allow my ssseed to ssspread, and in the morning when we awake, I will get more wives to join ussss."
Mary simply watched as he nodded off to sleep. So now she had a choice to make.