It was at that moment that Jen remembered the town curse for some strange reason. Not believing it was real, she thought it could make things a little kinkier with some role-play, as if having horse genitals weren't kinky enough. So, she asked Nick, "Transform or Dare, Nick?"
Nick moaned out a lustful, "Transform."
Jen giggled as she stripped off the remainder of her clothes. "For your transformation, you will be able to control how much in heat you are, gaining maximum pleasure from your maximum heat. You will also be able to control how strong your pheromones are and who they affect." Jen stroked her horse cock, thinking how hot it would be if Nick could really do that. Suddenly, she noticed how incredible Nick smelled. She moaned and grunted loudly as she gripped Nick's hips tightly. She thought she heard him ask her something but she didn't nor couldn't care less. Without waiting a second longer she rammed her cock in Nick's pussy.
"Oh my," Nick gasped as he felt the new and incredibly good sensation. He figured Jen must have had the town curse. How else could they be experiencing this? Now was his chance to change things to his liking, and Jen's curse on him made it so much easier. He decided to tone down his heat level just enough so he could concentrate on giving Jen the curse, which she had not answered thanks to his heightened pheromones. Jen started thrusting slowly in and out while Nick struggled to speak clearly.
"Since you did...not answer...ooh...you get both...aah...For your transform-ooh...you will never...lose your horse cock...no matter what." Jen grunted and gave Nick a hard thrust. Since he was unused to his new abilities, his heat level accidentally spiked. "Ohh...you will also become the epitome of...mmm...human homosexual masculinity...yes...your cum will pass on your transformation to anyone it touches while also randomly giving them a mare's pussy in heat like mine or...a stallion's cock like yours...For your dare, you will be completely okay with your transformation and...will cum inside me after you transform!" He then cranked up his heat and pheromone strength to the max and began to moan as Jen, and her body, reacted instantaneously.
Jen was so engrossed in fucking Nick's brains out that she failed to realize what was happening to her. The changes started at her feet. They widened and grew to a whopping size 12, losing their daintiness. Her calves ballooned outward and flexed with hard muscles as she rocked back and forth. Her ass plumped up with smooth yet taut muscles into a large, juicy, firm bubble butt, her thighs bulged with thick cords of muscle, and her waist narrowed considerably. The changes in her legs finished as they lengthened, increasing her height to 5'11". From the waist down now, she was completely male. With the new strength in her legs, she began thrusting more forcefully into Nick, whose cries of pleasure gave away how much he was enjoying himself. Large and thick abdominal muscles pushed out into a rigid 8-pack. Her torso lengthened as her boobs, which had been shaking about like crazy, quickly shrank down to nothing. They were immediately replaced with large, meaty pecs that jut out a good few inches from her body. Now at a height of 6'4", her shoulders bulged and widened so that her now incredbily large back muscles formed a distinct v-shape. Her arms swelled to massive proportions, with what appeared to be small soccer balls inside each arm, and her hands grew larger and rougher. Her hair began hastily receding into her scalp, forming a simple yet attractive crew cut. Her Adam's apple began to protrude out as her moans dropped two octaves into a rich tenor. Jennifer, whose transformation into a large, muscular, attractive man was complete, roared as he orgasmed into Nick, who orgasmed in return. After a couple minutes, they reluctantly pulled apart from each other and lay on the ground of the barn, panting and reveling in the afterglow of their orgasms.
"This new body is amazing," sighed Jennifer. "I never want to lose this body! I think I'll go by Jenner from now on. I had no idea you were gay, Nick."
"Guilty as charged," Nick chuckled. "Although I never dreamed I would have been fucked like that. That was incredible." Then...