Mike and Emily made out on the couch, their bodies pressed close together. Their tongues had intertwined before but with Emily's more snake-like tongue it was a new and exciting experience.
Suddenly, Emily pushed them apart. "My ssstomach" she hissed and pulled her shirt up from the bottom to just below her breasts, revealing snake-like belly plates forming.
Mike ran his hands around her torso, discovering the snake scales had spread to Emily's sides and mid-back. Running his hands over her stomach made her squirm with pleasure. Then there was a slight ripping sound and Mike felt Emily's legs shift beneath him.
"I can't seperate my legssss!"
Mike reached up Emily's skirt and placed his hands on her scaley hips then ran them down the front of what had been her legs but was now becoming her tail. He slid off the couch and onto his feet, following the transformation as Emily's legs lost definition and snake belly plates formed across the front of her new tail. It was like a magical snakey zipper moving downward. He got to her feet as they lost form, her new tail extending past where her feet had been.
"I'm a naga!" Emily declared with glee. She beamed at Mike, who grinned back.
Mike ran his hands back up the sides of Emily's tail, careful not to rub her belly plates on the return trip (as he would have been running them the wrong direction). He followed her tail back up under her skirt as there was another rip and Emily's skirt was snapped by the growth of her tail. Mike threw aside the snapped skirt and the remains of Emily's panties (shredded by the transformation from legs to tail). Her cloaca was moist in anticipation.
Emily pulled her shirt up over her head and cast it aside followed by her bra. She rose up off the couch, giving Mike a view of her at her full height - once shorter than him, but now slightly taller. The belly plates running from the end of her tail up to her stomach extended to just beneath her breasts. The scales extended up to her armpits, leaving her arms, shoulders, neck, and breasts fully human (and her head, except for her eyes and tongue).
"So how do you like me now?" asked Emily. "Am I not the fusion of human and snake you have always fantisized about?"
Mike could barely restrain himself. "You are so amazingly hot right now, Emily. You are the most beautiful woman I have ever seen in my life."