I tell you in all confidence that marcia was in earnest when she tuuged me into bed that night. Her desires were being mixed with sensual equined instincts making her as lusty for sex as any mare in heat. She tossled my malesness making it harder than hard and me more than willing to continue the romp.
We forgot diner and continued till well past midnight before I had to stop and get a drink. It was then that Marcia thought to check her change. She stood by the mirror as the indirect light from the bathroom flooded her way.
Again I stood there just watching as this pouty model of ponydom turned her seductive body around in front of the mirror.
"I don't look all that bad, do I Sam?' she asked as I knew it was the serum's inducted attitudes which made her ask.
"You look just fine and I would love you again!" I said.
Marcia rolled her eyes as if "come and take it!" and so I stepped close to her as my erection came to full size. She put her hands on my shoulders and with new remarkable strength she pressed me to kneel down. A little side slink and she offered me to bury my face into her pony mare'd groin. She motioned I suck her teats and then she moaned for to come and lay on the bed.
I enjoyed my manhood that night as never before, she was just plain wild for sex. Her body was changing but for some reason now she thought of it as worthwhile and the perfect way to live. I marvelled at how long I sayed erect and inside her tight vagina.
Morning brings the thought of us parting as human returns to his life and she, well Marcia was in hope of being put to pasture very soon. That's when I picked up the Qualification form and turned it over. There sitting before me was written some very astounding words, "Prime Antidote: mix white Vinegar two parts with Chlorine Bleach, drink slowly over two hours to reverse growth patterns"
I whirled around to look back at Marcia but she was again standing before the mirror.
Our wild night was for her not without its consequences, her body had chaged to the limit the first serum would have done. Skin, hair, ears, lips, nose a muzzel, the beginnig of her mane, rounded buttocks more formed to equine than human perportions. Her vulva moved into position and ready for action as a mare. A tail bone extended out a good six inches and the wisking small tail of a foal. her fingers now grown together as the nails melded into a solid one toed hoof. She lifted her foot one by one as the toes there to were changed.
"I like this Sam if feels so nice!" said Marcia in her now slurred speech from lips made ready to graze.
I stood there wondering which was better for her, to become a mare as the serum flux had begun or tell her and help her regain some of her humanity?