"I have a tail?" He asked, as it started to wag, spreading his potent pheromones throughout the room. Alex bit his lip, and ignored his growing arousal, concentrating on Mike. He stroked Mike's tail again, feeling it wrap around him, gradually growing fur, a two tone gray and brown extremely stark on the round limb. "Oh, yeah... I have a tail." Mike groaned into the pillow, and his wagging redoubled.
Alex shuffled over the helicoptering limb, and straddled Mike's wide back, already stronger and more defined, just begging for the rest of the change. He slowly worked on the different muscles, feeling them harden and press back, knotting then softening into a defined set, bulging through his skin, slowly pushing upwards and outwards. Mike rolled his shoulders, almost dislodging his smaller partner, and Alex looked up and down Mike. He'd gained at least a foot of height, though a lot of that was from his feet and legs reshaping. Still, there was a lot more for Alex to work on, and it was practically begging for it, Mike's half furred form promising so much.
Alex stood up, and started walking on Mike's back, sending it twitching and growing, the pads on the bottom of his feet working on the still unchanged muscles, rapidly shifting them into hulking werewolf strength. Soon, it was massive, bulked and defined, even through the thick layer of fur.
"Ready to flip over again?" Alex asked, standing on the edge of the bed, trying not to slip into Mike's mattress depression. He had to have grown another foot, and almost doubled in weight; the bed was complaining with every shift.
Mike grumbled for a moment, then rolled over, adjusting his tail so it whipped back and forth between his legs. His upper front was mostly unchanged, just larger, matching his back, fur framing his crotch. His dick was partially shifted, human but redder. It was a bit longer, maybe seven inches, spilling past Alex's hand, but still only about half his own length. Mike's balls were larger, but not by much. Though there probably were some changes inside, since it was leaking a constant dribble of precum, lubricating the soon to be monster.
Alex dropped to all fours, eyes focused on his boyfriend's dick. He slowly drew close, inhaling Mike's musk. It wasn't as powerful as his own, but it was rapidly shifting towards full werewolf. His eyes went slightly glassy as he started licking the pink cock, his own tongue slowly growing far past human, wrapping around the swelling wolfhood.
Mike groaned, thrusting up, squirting a blast of precum across Alex's face. His cock was getting painfully hard, and it was taking all his willpower not to grab his Alpha's head and thrust until he was satisfied. Alex looked up at Mike, his own mouth slowly pushing out into a muzzle, his cold nose adding a counterpoint to his eager lapping. Which seemed to be getting harder?
Alex pulled back, confused. It seemed like Mike's cock was receding, pulling closer to his stomach, as his fur started growing up past his legs, towards the base of his dick. His dick was getting thicker, more leathery, as his balls started swelling, straining his still mostly human sack, as they grew from ping pong balls to large eggs. Alex grinned eagerly, cupping and playing with his balls, going back to licking Mike's developing sheath, already thicker and larger than what he started with.
Mike's groans became more needy, his balls beginning to pump in his overfilled sack, pulling against Alex's teasing, growing in size and potency. He could practically feel them pumping testosterone into his system, and his muscles suddenly started twitching and aching all over, not needing Alex's touch to spur them to grow.
Alex didn't notice, now licking the inside of Mike's developing sheath, only the reddening and increasingly pointed head poking out. It seemed to be softening, even as Mike's moans become more desperate and ragged. He shuttered, the bedframe creaking ominously, and his hips locked, straining and tightening. After a few seconds, he relaxed slightly, panting.
"Fuck... that was intense." Mike murmured, his voice deeper and more powerful.
Alex didn't say anything, still licking, half high on Mike's pheromones, his own cock hard and leaking. He felt Mike's cock start to harden again, rapidly pushing out of the sheath. Alex blinked, surprised by the sudden third leg. He shifted, bringing his hips around, comparing their dicks, watching, dry mouthed, as it kept growing. After a few seconds, the sheath bulged out, and two thick masses popped out on either side, as the cock stood there, jutting out proudly, twitching in time with Mike's heartbeat. Alex was awestruck. It looked like it could take up most of his chest, and he still wanted to experience it.
Mike raised his head, confused at the sudden lack of sensation. "That's really not mine." He rumbled, reaching out to it with one hand, and grasped it gently, fingers not able to wrap around it entirely. His eyes widened at the sudden burst of sensation. His cock was huge, not as large as wolfed out Alex, but definitely half again as big as normal Alex, large enough for forearm and fist to be a good comparison. It was bright red, with blue veins running throughout the slick smooth surface. The shape was strange, halfway between human and canine. The head was blunter, the shaft was thicker, but the knot was definitely all wolf. Thick and imposing, each one was almost as large as one of his paws around half the shaft.
Mike was awestruck, slowly running his paw up and down his new wolfhood, his sack and balls growing to match the massive spire. Alex tore his eyes away, and looked up at his boyfriend. Mike's chest had become furrier, his muscles more defined, and the proportions had shifted a bit. He ran his hands down Mike's solid six pack, over his defined pectorals and, judging by Mike's yelp, his sensitive nipples. The changes started to accelerate, and Alex worked to help, rubbing, teasing, and stroking everywhere he could, watching as his mate hurried towards completion.
His arms remained mostly the same, becoming longer, stronger, and gaining lethal claws, but not changing to nearly the same degree as his legs. His chest was also human, rather than becoming barrel-like, as on most quadrupeds. But, the last place to change was Mike's face. The fur rapidly grew, until it was much thicker around his neck, giving him something of a ruff, while his human hair receded, becoming invisible underneath the mostly brown coat. His ears shifted, moving up his head, as they became increasingly pointed. The last piece was his face and soon to be muzzle.
Alex crawled around Mike's cock and started kissing him, startling him out of his slow confused masturbation.
"You are so fucking hot." Alex murmured, biting Mike's lip, hands running up and down his massive muscles, rubbing his soft fur, and hugging him closer as his head started swimming in pure enjoyment. He felt Mike's muzzle slowly push out and his teeth sharpen as their tongues fought and wrestled, tasting each other. After a while, they broke away, both panting, Mike was a full werewolf. His eyes glowed a menacing gold, his arms and strong enough to lift a car, and his cock a near lethal weapon, matting his own fur from the lubricants it now produced.
"How are you feeling?" Alex asked shuffling back, and running his hands up and down Mike's cock.
Mike whinnied and looked confused that they'd stopped, then shook his head, human back in control. "That was probably the best thing I've ever felt." He murmured, running one hand down Alex's cock and shaking the bed.
Alex grinned, and fur rapidly started pushing out of his entire body, as the bed creaked from the weight of two werewolves. His own transformation was much faster, and more eve, than Mike's, and he stood up as it finished. "This gets easier every time." He muttered to himself, watching his cock snake its way up his stomach, comfortably resting just beneath his pecs, as he swelled to his full height of 10 feet.
The bed's legs gave out entirely, crashing to the ground, causing Mike and Alex to jump in surprise, before bursting out laughing.
"We managed to break the bed before we had sex! That's amazing!" Mike joked, letting go of his mate, standing up on the polished concrete floor, his new pads keeping him warm.
"That'll be a fun thing to find, werewolf sex proof beds. Probably will need a shit ton of steel." Alex said, standing up with Mike. The two werewolves looked at each other, comparing and remembering from when they were human.
Alex was grey and white, while Mike was mostly brown. 10 feet tall when standing as upright as he could, Alex was head and shoulders beneath Mike at about 12 feet, while Mike also was much more muscular, his arms forced to stick out at an angle by his sheer bulk. Alex was almost lithe in comparison, despite beating most power lifters. They wanted to find a scale that could weigh them, but, based off lifting each other and parts of Alex's home weight set, Alex was close to half a ton, while Mike was probably half again that. Otherwise, same general design, with a few variants. Mike's paws were bigger, while Alex's tail was proportionally longer. One of Mike's ears was floppier than the other. The most obvious difference was in their equipment. Alex's junk still looked absurdly oversized on his frame, maybe more than ever since there was a basis of comparison.
Alex's cock was half again as large as Mike's, thicker, with a more pronounced knot even before it swelled. Their heads were about the same height, around the base of Alex's pecs, a bit above Mike's bellybutton, but Alex's had a lot further to go. His balls were larger too, almost too big for their sack, swollen, with glands bulging out, so oversexed they couldn't go anywhere else. On, the other hand, Mike's asshole had swollen out to a doughnut shape, constantly lubricated and ready to do, easily spread by Alex's hard pointed wolfhood.
Alex slowly thrust in, Mike moaning as his needy hole was spread, the massive invader feeling absolutely right inside his altered body. Alex slowly picked up pace, his knot pounding against his mate's hole.
They had a long, messy, blissful night.
***
Alex slowly woke up the next morning, cuddled around Mike. He felt like he had all the energy in the world, ready to get up and at it. He carefully disentangled himself, and started getting changed, intent on going to the gym before work. As he was doing so, he heard Mike yawn, and stand up.
