Katie looked horrified, and was thinking about the choice before her. A lifetime as a mermaid, or an eternity of servitude to her desires and my whim. It was an impossible choice. Not only that, but her eyes were drawn to my still throbing cock, massive before her.
"Jake this can't be what you want." She said as she looked at me. Her eyes were full of tears, and she looked at the edge of a breakdown.
I smiled at her, seated next to her on the desk, rubbing her breast with my hand, moving up to the large, sensitive nipple. "I want you to be mine, but I'll respect what you say, the choices are yours."
Katie closed her eyes, breathing deeply. She lay next to me. Tears dripped down her cheeks. "I don't want to be a nympho, I don't want you to control my body." She pleaded.
I smiled some more. "The you have one choice"
I said as I stroked her.
She was crying, tears streaming down her cheeks. "I... I want the other choice." She sobbed out.
I rose from the desk coming to stand before her legs. "What do you choose to become Katie, say it clearly. This is your final choice."
She looked at me with teary eyes. "A mermaid, I want you to make me a mermaid." I smiled as I moved forward, spreading her legs as I positioned my self. Her breasts, larger than ever before heaved with her breath and Katie was panicked.
"Take a hold of my cock" I commanded her. She looked up. "Do it" she grabbed it, throbbing in her hand, tears down her cheeks. "Guide it to your pussy, this will be all your choice to do." I told her.
She guided with her hands my dick to her pussy, shuddering as she did. As my cock brushed her cunt, a blue scale appeared. "Oh God no" Katie pleaded.
"This is your choice, what do you want, to be my mermaid, or to be my slave of pleasure" I said to her, as she hovered at the brink. "Which one Katie, DECIDE!" I declared.
"I want to be a mermaid!" She cried, and trust my cock into herself. Her eyes snapped open, as she pulled me into her. I thrusted forward, feeling the warmth of her cunt surround my cock as I filled her up. Yet again the scales began to appear, wrapping around her cunt and rapidly spreading around her legs.
"This is what you wanted" I said as I thrusted rapidly into her, "this is your choice, to be my mermaid, my woman!" Her mouth was wide open, eyes in the back of her head, her back was arched, with her massive breasts jutting out proudly, bouncing with every thrust. Her hands were on my shoulders, for a purchase as I thrusted into her. The scales wrapped up her legs, down to her ankles, slowly the pulled her legs together, her cunt moving to the front as I kept pounding her.
Her face twisted with terror as her orgasm mounted, knowing it would be the end of her humanity forever. "Oh god,oh goD OH GOD!!" She screamed as I fucked her. We had nearly reached her breaking point, and she moaned over and over. From her ankles on up was a blue scaled limb, with only her feet seperate. They wiggled desperately trying to hold off the last part of the transformation. But Katie was as good as done for. I smiled as I felt her lose herself, felt her become mine. With a great thrust I fucked her, and she broke."I CANT STOP, OH GO I CANT IM CUMMING OHHHH!!" She screamed as she orgasmed. Her feet flattened, and merged into a tailfin. Her legs molded into a solid tail. As her head fell back, her ears flattened into points. With a yell I finished into her exes audited body, pumping my seman into her womb.
"Welcome to my harem Katie." I said as I slid off her. She lay below me on the desk, her new tail shining in the light, breasts heaving from her life changing orgasm.