Punish his mother by denying her orgasms.

John wasn't just some helpless plaything. He was going to take his own control of the moment, and he knew just how to get back at his mother. If she was so **** for relief, he was going to make sure she didn't get it. He snapped his fingers, knowing that, from then on, there would be no release for her. Try as hard as she might, Julie would never reach climax, endlessly growing hornier and hornier.

He didn't have much time to congratulate himself, though. Once lined up, his mother thrust him into her crotch, each of his cocks nestling in to one of her pussies, the copious lubrication letting them slide in easy. She pulled him out, then pushed him back in, then out again, over and over, like he was a living sex toy. Julie used her numerous, muscled arms to fondle her breasts and stroke her own dicks, indulging herself in every way possible.

"Unnnnggh, pleassssse! More! Give me relief!" she cried. As she felt a climax build, her body tensed and rumbled. Larger she grew, now seventy feet high. "I'm getting sssssso closssssse!" A second tongue sprouted from her mouth, slithering around beside the first. "Come on! Jussssst a little further!" Visible veins throbbed as her muscles inflated into an almost cartoon-ish parody of bulk.

Meanwhile, John felt like he was fighting for his dear life. His mother thankfully wasn't crushing him in her grip, but it was difficult to stay stable with the constant thrusting. He closed his eyes and focused on what his cocks were feeling, which was really good at the moment.

Julie felt herself on the precipice of orgasm. Her hips bucked, her round buttocks jiggling with the motions. She was so close. She was right there. She could feel it, it was happening right now!

But, it didn't happen. Something was wrong. Her red eyes went wide and wild as she let out a primal roar of lust and frustration. All that pent up desire seemed to explode into her at once. She winced as her body grew nearly twice as big. More arms sprouted down the sides of her body, tripling their count. Her claws grew longer, thicker, harder. Her forearms split in half, creating two sets of hands branching from her elbows. Extra tails grew off the base of the first, until her lower section resembled the tentacles of an octopus, but scaly and smooth. Her fangs stretched ridiculously long, three times longer than any normal snake's, and thickened to match. No longer would they neatly fold into her mouth, awkwardly jutting out of her lips.

Her sexual features weren't to be outdone. Her breasts swelled up once again, each three times the size of her head. The nipples atop them lengthened and thickened, sticking out like thick, fleshy straws, which her new arms got to work pulling and stroking. Her backside grew into two massive orbs sitting atop her tails, her lowest arms reaching down to squeeze and fondle them. All twenty-five of her cocks grew much like her nipples, extending both their lengths and widths. Finally, her pussy lips swelled immensely, now more than simply puffy.

The last change was too much for John, and he finally came once again, increasing the number of his dicks to six, the most recent one flopping heavily against his mother's scales. White seed flooded Julie's depths, her belly distending as John's truck-sized testicles worked as hard as they could. The woman moaned as more of her filled up, until her belly resembled a late pregnancy (if her numerous, enormous tits didn't hide most of it). John looked up at her, curious about how she'd react to his ploy.