The replacement

A request for @chesshire

"Wow!" Was all James could say as Mia let her robe slip from her shoulders.


He marvelled at his girlfriends delicate beauty still not quite believing his luck. She looked up at him with a shy nervous smile.


He kissed her with gentle passion and looked into her dark eyes.


"Are you sure you are ready for this?" He asked "we can still stop if you want?"


"No" she giggled "It's okay. I want this. I want you."


James needed no further encouragement.  He took her in a passionate embrace tumbling onto the bed with her. He had worried that this day would never come. That she would never be able to overcome the emotional damage done by her ex enough to be intimate with a man again. He would have waited as long as it took to be with her but the way his cock sprang to attention at her caress made him very glad he hadn't had to wait any longer.


The rest of their clothes melted away as they explored each others bodies. There was no rush, no urgency, they had the rest of their lives to be together. This first time, they both agreed, needed to be special. They were so intent on their foreplay neither of them noticed the man until he spoke.


"Ahem" he cleared his throat theatrically "I see you didn't waste any time getting over me, slut."


"Andy!" Mia squealed in shock and confusion pulling up a sheet to cover herself "What...? What do you want?"


"What I've always wanted" he said with a smirk "My good obedient fucktoy back."


"Wait, Andy? Your ex Andy?" James demanded clenching his fists.


The man isn't exactly what he'd pictured from the little Mia had talked about him. He'd been imagining some knuckle dragging thug but instead he was faced with a most unimpressive specimen of a man. He was short and paunchy, thick glasses covered bulging grey eyes, greasy hair plastered over his brow. Still, James supposed, bullying and domination a petite girl like Mia wouldn't take much muscle.


"Alright asshole" he growled "There's nothing for you here. You better fuck off before I throw you out."


Andy laughed at James' threat.


"No, you won't" the interloper sneered "EZEERF!"


James found himself frozen in place. He was unable to move no matter how he struggled against the invisible force binding him.


"No please," Mia begged "You promised, You said..."


"ECNELIS" Andy snapped and Mia's protests died mid sentence.


Andy looked looked down on the helpless pair. He savoured their fear and confusion but he was far from done with them yet.


"Hmm, he doesn't look like much to me," Andy said looking James over "But if this meathead is what you really want then who am I to stand in your way? KCUF!"


At at his command Mia's body began to move on it's own. She climbed on top of James, grinding against him a slow sensuous rhythm. James felt his cock harden despite himself. He looked up into Mia's tear filled eyes and understood that neither of them were responsible for what was about to happen. He opened his mouth to protest this violation but the expression of sadistic glee on Andy's face stopped him. He refused to give that pervert the satisfaction of hearing him beg.


He groaned as Mia guided him inside herself feeling the velvet softness of her sex enfold his aching member. It felt even better than he had imagined and he hated himself for that. She rode him with single minded intensity. Steadily, increasing her pace until he felt her spasm around him in climax.


"Oh god! God Mia, baby I'm.... I'm gonna... Ahhh!" James came with her, pumping her full of his seed while wishing more than anything he could stop himself.


"Very well done Mia," Andy gloated "You always did no how to take a guy well. In fact you are so good at it I think that's all you should do from now on. TNUC!"


Mia gave a mute sob of despair as her body began to change. James could only watch in horror as her mouth pulled inward then stretched up vertically reforming into a new vagina in the middle of her face. Her nose was engulfed by the new organ becoming the fleshy nub of a clitorus She tried to clamber off of her lover but it was already too late for that. Her legs merged seamlessly with Jame's everything below her middle thighs vanish where it met his legs and hips. She continued to sink into him like he was quicksand. Soon, only her body above the waist jutted from his crotch looking like she had grown there in place of his cock. She attempted to lever herself free. Tried to push against him with her hands only for them to melt away along with her arms. Her transformation accelerated. What remained of her shrank rapidly losing the last of it's humanity. Her full breast shrank away, her shoulders merged with her neck. She became a face with a pussy on top of a smooth fleshy tube. Then the tube shrank until she was a face and a pussy covering James' crotch. Finally, her face faded into his skin leaving him with his girlfriend's cunt between his legs in place of his penis. He cringed as he felt the load of cum he had deposited inside her earlier leaked out of his new sex and dripped onto his thigh


"I'm sorry. So sorry...." he thought he heard her voice inside his mind but it soon faded leaving only the warmth of her presence.


"You bastard" he yelled at Andy "I'll kill you! I'll fucking kill you!"


"Yeah sure. You might but I don't think you've got the balls" Andy giggled at his own joke. "Now, one last detail to take care of then we can go."


"We?" James asked confused "what do you mean? I'm not going anywhere with you."


"NRUT OTIN AIM, YM TOH DNEIRFLRIG" Andy intoned in response 


James felt something crawling underneath his skin, like he was filled with ants made of electricity. The almost painful tingling spread through his body then concentrated in his chest. He gasped in shocked disbelief as a pair of breast sprouted under his nipples. They were full and firm just like Mia's had been. Even as he gawked at his chest the tingling shifted to his rear. That too reshaped itself into a more feminine form, his hip bones creaking as they widened.


"Childbearing hips" the incredulous thought floated in James' mind


The changes continued, travelling down his legs leaving them smooth and shapely. His arms follow suit and long dark hair brushed over his shoulders. The tingling shifted to his face and his vision blurred for a  moment. He didn't need a mirror to guess how he had changed, it was obvious to him what Andy intended.


"You sick fuck." he said hearing Mia's familiar voice coming from his mouth "Do you think just because you've made me look like her I'll be her for you?"


"Yes that's exactly what I think." His tormentor said leering at the perfect copy of Mia's body he had trapped James in "You will be my obedient girlfriend and if you ever think of defying me just ask the weak pathetic cunt between your legs how that worked out for her."


With that he released the new Mia from her paralysis and began to strip. She wanted to scream or lash out at him but she dare not. She belonged to him now, his to play with as he wanted. She could only hope he would treat her kindly but from the hungry look in his eyes she doubted it.