Mark is transformed

"Do it Becky. Turn him into your ****!"

She put the collar aroun his neck, while he was still deep inside her vagina. One of her hands proceeded with caressing his neck and putting the collar on, while the other still kept his whole head inside her. The best thing about her new body was the feeling of being in control, unstoppable, and heck, she was feeling that way putting the collar on Mark.

-Now Mark... Be quiet...-

With a click the collar was firmly positioned on the boy's neck; it immediately fit on his neck, almost like it was built with the exact purpose of being worn by Mark and Mark only. It fit so tightly that it almost looked like a tatoo on his skin.

"Oh finally Becky. You truly begin to understand my true potential. YOUR true potential."

Becky was puzzled by the book's words in her head, until a dark aura begun spreading from Mark's neck, much like it already happened with Danny's transformation. The necklace soon merged with Mark's skin, effectively turning into a tattoo. The boy head finally came out of Becky's pussy, revealing his messy and dirty black hair as well as a pair of white eyes, completely rolled back inside his head. A thin layer of saliva came out of his mouth, making him look like stuck in a sort of trance. For the first time in days, Becky actually was scared of what she was witnessing. She searched for Danny's hand, and when she finally found it she held it firmly to gather some strengths.

-What have we done Damn?-

-I... I don't know Bex. But it can't be so bad if it feels so good, right?-

The old Damn emerged for a moment from the sex god sitting next to her; the fearful boy who loved videogames and just wanted to have a good time. His hearth was going at a mad pace in his chest, as Mark's transformation happened before his eyes. From the boy's neck, one of his vertebrae begun to grow out, emerging from his skin with a tall black spike, of the same material of the necklace. The boy begun to scream with pain and suffering, almost in agony, until the growth finally stopped, leaving him with a black 10cm spike on his neck. Immediately after, his whole spine begun trembling, as similar spikes bursted out of his bones along all his vertebre. Two similar spikes were emerging from his forehead, letting a black substance erupt from his skin forming two large and curly horns. With inhumane strength, Mark (or what formerly had been him) grabbed Becky's arm and pulled her away from Danny's embrace. Becky was scared, but also terribly aroused by what was happening; in the meantime Mark's transformation hadn't stopped, and instead only got quicker and stronger. His muscles already perfect, became even more defined, and as they expanded his along became hard and grey, like if he was made of rock. Becky loved the sensation of his hard body pressed against her, and soon he got up still pulling Becky from her arms. His dick also terribly increased in size, stopping at 20 cm in length and 4 in diameter; Becky the heated a strong cracking sound coming from behind her, as she saw a massive phallic tail erupt from Mark's back. It was blackish, scaly and smooth, almost a meter long and it quickly reached her body and begun caressing her cunt. She was scared by the creature, but that massive dick reinvigorated her urge to fuck Mark. The beast quickly moved his hands on her boobs, beginning to massage her erect black nipples. A sound of satisfaction came from Mark's mouth, an inhuman growl more for to a dog than a man. Danny's face in the meantime had been covered with a mask of horror and terror, horrified by what he himself had created.

-Becky!-

For a moment the old protective Danny was back, as he jumped towards Mark; however his new body nothing could against the forces of hell, as Mark's eyes glowed with a purple light, blinding Danny. and the creature's tail quickly hit him in the air and with incredible strength knocked Danny in the floor. A sting then came out if the tail's phallic ending, hitting Danny on the right arm and paralyzing him, locking him on the floor with a scared and horrified face.

"Don't worry Becky, my dear. This won't last much. He'll be paralyzed for a few hours. But he'll enjoy watching"

"This is wrong, this is all wrong."

"But it feels good right? You like the idea of being fucked by this beast, a cock you'll never find on a normal human..."

Becky thought about it, about what she was about to do; she gave a last look at Danny, stuck on the floor, with the hard black sting in his arm like an arrow on an injured soldier. She thought about Mark, his life forever destroyed by their dark magic, his soul twisted and thrown into the flames of hell to accommodate her lust. But then, she was no longer able to think about anything because Mark's massive dick had entered her ass. A wave of pure pleasure rocked her body, as she had never believed something so huge could fit inside her; she was **** to bend for the sheer **** the beast was using, and heck she loved it. A feral grow came from Mark's mouth, his hands still firm on the girl's tits, squeezing them with inhumane strength.

-Grrrwlll-

He put his head on Becky's shoulder, making her feel the power of his rock-like body. She felt a moisty and sticky thing caress her cheek, and realized it was Mark's tongue, which had become almost thirty centimetres long in the transformation. She tried to turn aroun and look him in his eyes, to search for a glimpse of humanity, but she could barely move her head, locked in a state of pleasure and shock.

-Ohh... Yes! Yes! -

His long tail found its way across her legs, twisting around her left one until it's fallic tip reached her cunt; with a quick whip it entered her vagina, immediately reaching her G spot. The feeling of being filled both in the anus and in her vagina was overwhelming, something she could describe only as a sense of completeness, a state of ecstasy that she simply wanted to last forever.

-Bex... My... Mistress-

Mark's voice had changed completely after the transformation; it came from deep inside him, a place almost as remote as hell itself. The creature spoke difficulty, like every word caused immense pain.

-Fuck me! I order you! Fill me!-

Mark kissed her on her neck, making Becky feel his long fangs on her skin. Obeying to the command, his tail begun to twist in wild contractions; Becky understood what was happening, and quickly her vagina was filled with the creature's thick white cum. It was too much for her, and it quickly begun to overflow on the bedsheets. At the same time Mark put his dick out of her, coming from it all over her butt.