At his current size, Jay was easily five feet taller than Megan sitting on his rear haunches. Standing, he was still much taller than her. He was only just starting to gain some translucency to his rubbery body, his deep purple color having lightened somewhat, and a sheen from the sunlight above the resort making him glisten in the morning. He was beautiful, and Megan couldn't wait to see how big she could make him. Before applying another spritz of strengthening stuff to let him go even bigger.
Sitting as he was, the orca advanced on his friend and placed a vinyl hand on his dragon friend's jutting cock. It was smooth, with a long oddly shaped head, but Matt knew what Jay liked. The orca began kissing the cock with his large lips, hands beginning to massage and stroke it, and Jay could feel his pressure building as he began to grow warmer. It was weird, but he could feel the air inside of him turning to condensations the hornier he got, and soft droplets of water were trailing down his inside chambers.
Megan kissed her horny dragon balloon a little more, grabbing his neck, stroking his long majestic face, and feeling him grow warmer and more pliable as Matt touched and pleasured. It would be a futile effort, she realized, to blow him up by her own power, and again she reached for the little air pump. This time, however, she saw Jay's expectant look as he parted his lips, but Megan had other ideas. Patting the dragon's snout, the orca beginning to lick his shaft with a slick rubbery tongue and making him moan, Megan walked behind him, hand on his soft firm side the entire while, and traced her palm down his back, along his tail, and under the base of it.
Jay realized what was about to happen and grinned wide, feeling a little discomfort as Megan slipped the nozzle of her little battery powered pump under his tail and into his anus. It all lead to the same hollow inside of him, he realized, and as she fed some hose into his rear he felt the tip of the nozzle strike what must be the weird sphincter keeping his air in.
"There." Megan said sweetly, Jay squeaking as he turned his long neck to regard her, face pulled into a grin. She set the pump for its lowest setting again, turned it on, and the device hummed to life behind the dragon. The hissing started anew, the hollow filling sound inside of Jay began to build, and once more the dragon began to pump up.
Megan dashed back to Jay's front, seeing him practically panting with pleasure, and watched with aroused delight as Matt skilfully licked and sucked on his growing member. Soon enough, Jay was stretching larger slowly but surely.
"Oh!!!" The dragon cried. "Oh, yes! Yes! It feels better and better!"
Megan marveled, still holding Jay's head on her shoulder, as he grew and stretched out. He suddenly snapped taut, she could feel the difference, and his rubbery purple body grew even shinier and more translucent as he ballooned in front of Megan and Matt. The orca adjusted himself, eager to keep pleasing his friend, and he found he could sit on Jay's much bigger balls like a cushion while still rubbing and licking the dragon's huge purple dick.
Jay growled deeply, the sound reverberating from inside of him, and as he sat there blowing up, he realized he was now easily twenty feet tall, and still growing steadily.