The big wolf boy watched in sarcastic joy waiting for his friend to see he was right.
Sean, however, his enormously big and strong dinosaur form growing more horny, began to feverishly rub his crotch. He could feel it. It was rising, growing inside of him. He balls became more pronounced as they tightened inside of him, appearing as two bumps under his hide, and finally, slowly, a slit opened between his legs. He kept rubbing, and a little bit of soft pink poked out through the slit.
"Oh shit!" Jeff gaped. "Is... is that?"
"Yesss...." Jeff rumbled, and squeezed the big pink tip sliding past his slit. Little by little, more and more emerged. An insane amount of long thick shaft snaking its way out in semi-erection. Until the full two foot long length, as thick as a pop can, spilled forth. Jeff looked down at it proudly, his hand pulling and stroking the massive member. "It's not even hard." He said in a deep growling baritone.
"I... I... wow." Sean looked at his friend's huge dinosaur cock and then back at his friend. "It's... huge!"
And getting more so, Jeff grinned toothily. As he worked his cock in thick fingers it grew and swelled even more. By the time he had it pumped up to full size, his cock measured an insane three feet in length, plump and thickened, and he growled joyfully as it throbbed in his hand. "And now..." Jeff looked at the much smaller and wide eyed wolf. "My little big bad wolf. You're gonna get this monster off."
"I-I am?" Sean looked up worriedly. "Not that I... I mean, I just spurted in front of you, but..."
"Shhh..." Jeff sat down carefully, his muscled dinosaur ass pressing down the floor, and wagged his tail. "Come here and obey the King."
"Oh God..." Sean whimpered, and raised his tall wolf self off the couch from where he had been watching. "Just... don't eat me or anything."
When his friend approached, Jeff grabbed his clawed hand and placed it on the tip of his cock. So big and eager, it was already leaking pre. The smaller wolf visibly blushed under his fur, and he gulped.
"Go on." The Tyrannosaur ordered with a toothy smile. "Let's see what you can do."