Kim fought in Heather's grip, trying to free herself and stop Heather from changing her any further. It made it difficult for Heather to lick her properly.
"Stop struggling! You are just making this harder than it has to be. You are going to change no matter what you do, you might as well let me help you get it over with, " said Heather, as she stopped licking and pulled the wriggling girl tight against her chest.
"Let me go!" screamed Kim angrily. Her anger caused her body to respond with another massive growth spurt. Her back slid along Heather's chest, lubricated by the large amount of saliva that coated her body. Kim's back felt a little strange, sticky and warm.
"Not until you stop struggling, " said Heather. She could feel the girl stretching and growing against her chest. Soon she would be too big for her to control. But she had to make sure that Kim completed her transformation. She didn't want Kim to overpower her, and leave her behind while she escaped.
"LET ME GO! " screamed Kim. Kim's neck lengthened and her large head smacked the bottom of Heather's neck. Kim's head felt smooth, bald. Heather decided that she had done all she could. She released Kim from the grip of her front claws.
Kim felt Heather's claws drop away, but for some reason she was still pressed tightly against Heather's chest. She wriggled around, but remained firmly held in place.
"I said, let me go, " said Kim, with a little less confidence. Her back felt strange. It was very warm, but numb like it had fallen asleep. Kim heard Heather grunt.
"I don't think I can, " said Heather strangely.
"What do you mean? What did you do to me this time?" said Kim, a little scared.
Heather sounded scared, too. "I didn't do anything. I don't know what is happening either. This never happened to me when I changed."
Kim craned her long neck down, and looked at her body. She was shocked to see that it appeared to be in the process of being absorbed by Heather's body. The yellow scales on Heather's chest were growing around Kim's body, encasing them in a flesh cocoon. Kim's body no longer seemed to be growing. Instead, it was Heather's body that was now getting bigger. With each breath her body swelled, and the scales covered more of Kim's body, drawing her more tightly into Heather's body.
Kim's legs felt numb. She looked down to her legs. Her feet were gone, and her legs ended in a smooth stump. Her calves were slowly shrinking, retreating upwards to join her thighs which had already melded with Heather's body. She pressed her hands and arms against Heather's chest, trying to push off and free her body. Heather's chest felt soft and wet, pliable like clay. She tried to pull her hands away from the repellent flesh, but the sticky saliva kept them attached. Her arms felt like taffy. Eventually, the scales of Heather's chest grew over Kim's hands, and they joined the rest of Kim's body inside Heather's chest.
The only parts of Kim that were growing were her head and neck. Every time Heather's body grew, Kim's head and neck doubled their growth, as if eager to catch up to Heather's size. As Kim's body disappeared into Heather's chest, her heart began to beat rapidly like a rabbit. Her lungs felt small and tight, and her breath became rapid. It was getting hard to breathe. She was afraid she was going to suffocate until she felt a rapid rush of air as her throat connected with Heather's lungs. She felt a rush of blood flowing to her head, as the blood vessels in her neck connected with Heather's circulatory system, and her own small heart withered away.
The new blood caused a surge of growth, and Kim's head and neck rapidly grew to match Heather's size. As her head grew, new nerves spread out from her neck, reaching down to all the lengths of Heather's body. She could now feel their shared body continuing to grow larger and more powerful. The cuffs of the chain pinched painfully on her front claws, until a growth spurt caused them to swell and snap the tight cuffs in two.
Kim was afraid that they were never going to stop growing. The previously large cavern now seemed incredibly small. She looked to Heather for help, but her eyes were closed. Heather just grunted as they grew, apparently lost in the pleasure of their growth.
Finally, the growth began to slow. And not a moment too soon. Their back was now close to the ceiling, and Kim had to duck her neck to keep her head from bumping the ceiling.
Now that the transformation was over, Heather opened her eyes. "Mmmm. Man, that was intense. Even better than the first time, " said Heather.
"Well, I hope you are happy. We are now a two-headed freak, " said Kim angrily.
"I'll admit, this isn't what I hoped for. I'm not too happy myself about sharing this beautiful body with anyone else. But it could be worse. At least I won't ever be alone again. And I absolutely love my new size. Bigger is definitely better, " said Heather.
"Great. Not only am I a freak now, but I am stuck with a lunatic, " said Kim.
"Relax. I meant what I said. Being a dragon is fun. Just give it a chance, and I know you will love it. Trust me. I can show you all the wonderful things you can do now, " said Heather with glee.
"Okay, genius. What do you suggest we do first? " said Kim angrily.
Heather chuckled. "Well, what do you think silly?" said Heather with a smile.