... then continues.

It was early the next morning when I knocked on Madam Jasair's chamber door. Her body servant ushered me. Jasair was in bed reading a book. It bore a lavish cover with Gold and Silver lettering that denoted it potentially as a Zina novel, a tawdry form of fiction I'd never had much interest in. My eyes widened a little as Zina novels could be quite risqué and there was a particular sort that dealt with serum girls.

She put the book down and nodded to the **** who excused herself. Also interesting as I had expected her **** to assist us...

With a smug smile Jasair climbed from her four posted bed. She wore a transparent silken night gown and I tried not to stare at the dark circles of her nipples or the dark tuft of hair above her sex. Always before Jasair had been properly dressed and maintained an asexual air. She was my brothers wife and future Lady Xeft - I had never been blessed with much sense with the women but even I knew enough to not covet my older brother's wife. She looked down, "Oh, don't worry, we're both girls here," she said dismissively. I was true, but her actions of the night before said the complete opposite.

She padded over to me on bare feet and gave me a hug. "Look at you", she clucked. I was wearing a very simple dress with sandles, "this will not do at all! You may as well wear a burlap sack! Let's get you out of that," and before I knew it my light dress was up and over my shoulders and discarded on the floor.

I should have felt embarrassed at being naked before my sister in law but, as she said we were both girls. If she had been a man it would have been entirely different. "Much better," she said with a smile. She stood only a little taller than me and looked down at my naked body. She ran a hand down my neck, thumbing my nipples and cupping my breasts. "I don't know why but that **** body suits you so much more than your old one, don't you agree?"

I shook my head dumbly as her hand traced down my midriff and left off just before my sex. She turned and led me to her bed, pushing me onto it then walking over to a wardrobe to unlock it. I frowned, wondering what type of clothing she would keep under lock and key.

As she worked I reached hesitantly for the book, curious to know its contents. She paused, noticing my action, "you can borrow that, I know you'll enjoy it. I have numerous other serum girl fictions. My preference is for story's about highborn serum girl coping with their new life, valiantly struggling against the inevitable descent from master to ****. In that story the protagonist tries to sate her slut urges by being a lash mistresses... only to fall victim to her urges and cross her arms to a common man. An engrossing tale but a little light on plot and heavy handed on... action."

I thumbed through the book and found its text immediately arousing. The pictures were also well executed and quite explicit.

"I prefer natural born woman in the role of lash mistresses," I heard Jasair say and turned to see that she held an unusual outfit, a **** training rig. And behind her loomed a wardrobe that never saw the light of day. I blanched. She wanted to dress me in that? A leather harness, corsets and garters and nothing else. I was not ready for that.

"You can imagine how frustrating it is being a high born lady and wanting to indulge in such activities? It's not like I have easy access to fresh serum girls... until now," she took a predatory step forward. "Now put these on," there was command in her voice and I felt it ring at the core of my being.

It is true that all serum girls have the **** gene but it is hard to say what that means. I think all serum girls are on the slippery slope towards slavery, but I was not yet that far gone. In that moment I did not obey the command in her voice. "I am sorry sister but I'm not yet ready for what you desire. I... may be one day... but not today." I stood and looked up into her eyes.

Her smile was unperturbed as she reached out and placed a manacle on my wrist. Jasair was a small weak woman but she was bigger and stronger than me and subdued me easily. "Stop. Wait!" I started but she put a gag in my mouth then pulled my hands behind my back and manacled them. She pushed me face down on the bed.

Next she prodded me into position with a small black leather riding crop. I was face down with my rear high and ready for mounting. "I cannot use whip and chain on you, though I sorely desire it. The marks would raise uncomfortable questions and I am a lady after all," she whispered in my ear then nibbled on my earlobe trailing wet kisses on my neck. I heard her open a small case. "But with this I can achieve a similar result," she said holding something close to my face. I focused. A needle.

"What is that?" I asked, licking my lips.

"Why it is chadwaer serum," she said. "You've heard of it no doubt. Quite expensive, but worth the price for one such as you. It will let me subjugate you with a feather instead of the whip." I struggled against my bonds in futility. She chuckled as she slapped my naked tear drop shaped buttocks. I felt a prick, a mild burning sensation and then it was done.

For the second time in as many weeks my DNA was irrevocably altered. This time the change was much more rapid. I could feel a flush over my skin. It felt hot, taught, energized. I knew that the nerves of my skin were becoming more sensitive, that the slightest quivering touch was now being rewired into the sex receptors of my brain. My entire body was becoming an erogenous zone. My skin was a sex organ. The largest organ of my body. Overlords!

But as she sank the shaft of her riding crop into my saer the enormity of that change was lost to me.