Terri's juices were flowing quickly as she began to change. I pulled her to me, slowly easing my erect member into her from behind.
"YES!" Terri howled out, "OH YES! DO IT!"
Her vaginal walls were far stronger then I had remembered. As I began to thrust into her, it felt like I was pushing into a hole that was an inch or two too small, that was how strong she was gripping me. It was taking all that I had to keep from cumming in her then and there.
As our present romp began, I leaned forward and began to massage her breasts as they hung down below her. I found that not only did they remain fairly firm, but they were slightly larger then they were a few minutes ago. Her nipples also seemed slightly longer and rock hard.
"You're bigger then before," I whispered to her, nibbling at one of her ears, which I noticed had lengthened into a point.
She turned her head slightly, panting in pleasure, though I caught some sign of discomfort on her face as well, which surprised me, given how aroused she was. Her canines were a little bit longer then before.
"YOU DON'T KNOW HOW MUCH BIGGERRRRRRRRRRR, YET," she moaned out, her vocal chords already changing, altering how she could speak, and then commanded, "HARRRRRRRRRRRRRRRDERRRRRRRRRRRRRRRR!"
I doubled my efforts in thrusting into her, but she was gripping me even harder now, and I was struggling to keep from orgasming with each thrust. As in awe of her transformation that I was, I wanted the moment to last. I knew it was incredibly shallow of me me to that into her now that she had the body of a Playboy bunny, though with bigger boobs, combined with a female super athlete, but then werewolves had been a secret fantasy of mine, and now my wife... my ex-wife was one and was demanding that fuck her while she changed. Who was I to argue?"
"OHHHH GOD, YES!" Terri moaned out, starting sound more like a howl then a human moan, "MORRRRRRRRE! MORRRRRRRRRRE! GIVE ME MORRRRRRRRRRE!"
I continued thrusting, but I was rapidly beginning to find myself in a problem. I could hear faint "cracking" sounds. Like bones were breaking. But no one had attacked me, and Terri was howling in ecstasy, so I couldn't place it at first. Glancing down, I soon saw the cause of the noise. Terri's toes and feet were changing. Her feet were starting length, taking on a more digitigrade stance where here heals would naturally not touch the ground. Her big toe had shrunk down to being not much more then a dew claw on the sides of her feet. The rest of her toes had enlarged and now sported sharp looking claws at their tips. I looked forward to see that her hands hand changed too. She still had thumbs, but each digit looked larger and more muscular. Each finger was tipped with sharp looking claws as well.
I could also feel the growth of additional hair on her body as I thrust into her. And as I tried to stay on her as she was now rapidly growing larger and physically more powerful, I saw fur growing all over her. It was rapidly covering her body, it matched her hair color and covered her evenly, though was thicker on her back then on her belly and breasts, which were much bigger then before and her nipples were now more teat like then a human nipple. I soon also felt two more pairs of nipples underneath her fur on her belly. She was growing additional breasts.
"YES! ALMOST THERRRRRRRRRRRRE!" Terri growled out, "ALMOST FRRRRRRRRRRRRRRREE! FRRRRRRRRRRRRRRRREE ME!"
I continued to thrust into her as she now raised her head up, as if she was waiting for something. My legs were straddling her hips and legs, which now stood much wider, and my heals were pressed against her knees as she had grown large enough that if I had kept my feet on the ground, I wouldn't be able to thrust into her with the force that she was demanding of me.
"DOOOOOOO IT! FRRRRRRRREE ME!" Terri howled again, and then gave a firm roar, that I couldn't tell if it was from pain or pleasure as her face pushed forward into a very wolf-like muzzle, though Terri's size was now much greater then that of a normal wolf's, so her teeth were also much larger, "FRRRRRRRRRRRRRRREE ME!"
I pumped my member in and out of her as hard as I could, but I was rapidly running out of steam. I was going to have to cum soon, and Terri was howling like she still needed something. And then I felt it. At first it was a little fur covered nub, but with each thrust it grew larger and longer. The fur on it grew bushier and almost wire-like. And then it happened.
"AAAAAAAWWWWWWWWOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!" Terri howled in ecstasy as her tail grew out behind her and had an orgasm so powerful that I came inside her at the same time.
After that, I ended up falling backward out of her. Cum was still dripping from my member and oozing from her vagina as she stood up. She towered over me, now standing nearly 7.5 feet tall. She had six breasts running down her chest. The top pair were the largest, easily, and the lower pairs were somewhat smaller then the pair above them. Each was tipped with a teat like nipple.
The sight of that seemed to get me going again, and there were a few things that also turned me on. One thing was the fur. In the movies, werewolves were typically conglomerates of flesh and fur, generally to make them monstrous looks. The only "skin" I could see on Terri's werewolf form were her nipples, the folds of her sexual organs, and the black triangle that was her nose on the end of her muzzle. And every curve on her... every swell of musculature... was perfect. She stood on her digitigrade legs in a stance that portrayed that she could stand, walk, and run on two legs fairly well, but could also run or walk on all fours very well.
"So, do you like what you see?" Terri asked as she looked back at me through bright and glowing golden eyes. Her voice carried a growling edge to it, but somehow it didn't sound aggressive to me. I could swear that she was smiling.
Unable to hide my member, which was ready to go again, I blushed and nodded. "Yes."
She crouched down low to bring her muzzle to my face and licked it a few times.
"And you'rrrrrrrrrre sure you'd like to join?" Terri asked, as if she was trying to control herself or follow some protocol.
"I love the new you..." was all I managed, "I want you for me..."
I got a half chuckle in response.
"Rrrrrrrrremberrrrrrrr that this will rrrrrrrrrrraise yourrrrrrrrr libido," Terri answered, "just as it did mine. I still love you. Always did. Lycanthrrrrrrrrropy didn't change that... but I NEED the stimulation. Be it frrrrrrrrrrrom male or female werrrrrrrewolves... and if you join... it will be the same with you."
I didn't answer for a moment.
"Night's Alpha Male and Female arrrrrrrre marrrrrrried and they accept a werrrrrrrrewolf's libido," Terri added, "so WE can make it worrrrrrrrrk."
"Okay," I managed slowly.
"Good," Terri seemed to smile again and then grabbed my arm in her paw-like hands.
I then screamed in pain as she bit into the meat of my arm, cutting the flesh. She didn't shake her head, and her teeth were out of me almost as fast as they were in me. As I blacked out, I felt her gripping the spot that she'd bit to put pressure on the wound, and I faintly heard several howls in the distance.