Weightlessness and expansion

After several minutes of greedily sucking on his mom's enormous round breasts and vigourously pumping his cock against her stomach, Mike couldn't take it any longer.

He needed to bust a nut on Melissa.

Mike retrieved the device and began typing.

[ MY MOM IS WEIGHTLESS WHEN I WANT HER TO BE ]

Wasting no time, Mike set the device down next to him and grabbed his mother by the hips. With a heave, his mom's body launched off the couch like lifting a feather. Her hair and clothing kept rising even after Mike stopped her movement, behaving as if she was weightless. Melissa acted as if nothing was out of the ordinary and continued to watch TV.

"Cooool, " Mike breathed.

Leaving her to levitate in front of him, Mike pulled Melissa's black yoga pants down over her toned ass and thighs. He shook her up and down, admiring her jiggly ass and breasts as they wobbled as if she were in space. He guided her around and down onto his lap, ass facing him. Melissa's thighs slid down and sandwiched his foot long manhood. Once her gorgeous ass contacted his pelvis, her weight returned and Mike's crotch was treated to delightful pressure. He thrust his mom's up and down, using her thighs to stimulate his huge cock. Each time her booty slammed into his groin, a wave of wobbling flesh pulsed over her glutes. Resting his mom against him for a moment, Mike slapped her toned butt and enjoyed the rippling ass meat undulating against his groin.

Getting an idea, Mike picked up the device once again.

[ MY MOM'S ASS GROWS BIGGER WHENEVER I SLAP IT, SHE WILL NOTICE THE GROWTH ]

Mike gave Melissa an experimental slap across her right cheek. Her butt instantly swelled a teeny bit larger. It was almost imperceptibe if Mike wasn't anticipating it. Melissa gingerly rubbed the red mark that Mike had left on her butt. Not satisfied with the barely perceptible growth, Mike played the bongos on her ass cheeks.

*plap plap p-plap plap.. plap plap!*

After each hit, Melissa's butt swelled a little bit larger. The growth was definitely noticeable now, her butt had swelled from a generic fit mom butt into a curvy booty. Mike wasn't done yet though. Lifting her once again, he repeatedly slammed her into his pelvis like before. With each impact, Melissa's butt surged bigger. Mike could feel her meaty ass becoming heavier against his groin and pushing further across his stomach and legs.

Soon, Melissa's ass was big enough to use as a shelf. Each of her butt cheeks was the size of a small yoga ball. Mike paused for a few seconds after slamming Melissa into himself to observe each growth spurt. Her thighs slid along the base of his huge cock, up... and down with a SLAP. Melissa's enormous round butt wobbled obscenely against his body, swelling a little larger.

"Really Mike? First big boobs and now my butt is growing?" Melissa complained.

Mike only grunted in satisfaction. He stopped pounding his mom into himself momentarily and picked up the device again before he got too carried away.

[ MY MOM WILL GRIND HER ASS AGAINST ME UNTIL I CUM ]

Melissa immediately began sensually gyrating her hips against Mike, rubbing her ass and thighs in a circular motion against his pelvis and stomach. Mike moaned and his cock pulsed hungrily between his mom's thick thighs. With both hands now free to type, Mike punched in a few more commands.

[ MY MOM WILL STROKE MY COCK UNTIL I CUM ]

Mike felt both his mom's hands wrap around his foot-long shaft and begin slowly pumping. He shivered at her touch, electric pleasure tingles radiated out of his huge cock. Melissa's fist bashed into her thighs as she stroked, causing the soft warm flesh to ripple against Mike's cock.

[ MY MOM GIVES THE BEST HANDJOBS IN THE WORLD ]

Melissa adjusted her grip on Mike's cock, stimulating his tip with supernatural finnesse. Mike's eyes rolled back and beads of sweat formed on his forehead.

"Hoooo, shit!" Mike exclaimed as his mom pumped his shaft with her vastly improved technique. Melissa continued to watch TV, completely unphased and uncaring of what her hands, ass and thighs were doing to her son's cock. Fighting to stay conscious, Mike **** his jumbled brain to punch in one last command.

[ MY COCK WILL GROW 1% BIGGER EVERY TIME IT'S STROKED, MY MOM WILL NOTICE THIS GROWTH ]

Casting the device aside, Mike gave his mom's ass a few more slaps on both cheeks. He sunk his fingers into her swelling butt as she rubbed and pistoned it into him over and over. Melissa let out a small moan as Mike kneaded her gigantic booty.

Suddenly Melissa felt a pressure against her underboob.

"Huh- Mike, has your cock gotten.. bigger?" she asked dismissively without taking her eyes off the television.

Mike's dick surged larger and higher each time his mom pumped his shaft. The growth had started off slow but was beginning to pick up speed. Melissa's hands were gradually taking longer and longer to complete each stroke of his shaft.

Mike's swollen helmet snugly wreslted its way between Melissa's breasts from underneath. Her massive bust enveloped his cock as it pushed upwards between her tits. Precum oozed out of Mike's leaky cock, lubricating the passageway as it swelled.

Groaning in ecstasy, Mike slapped his mom's ass again over and over. Her huge wobbling cheeks marched across his stomach and chest before finally smushing against his face. Mike hummed and wobbled Melissa's humungous ass against his face with both hands. It was all too much. Mike felt cool air against the tip of his cock as it parted his mom's breasts and swelled out of her cleavage. Melissa furiously pumped his inhumanly large member from underneath her breasts. Mike's balls churned and tightened.

"HNUGH"

Mike bucked his hips and exploded between Melissa's huge tits. Rope after rope of cum sprayed into her chin and neck. Excess sperm dripped down onto her massive rack. Mike chose to prolong the orgasm, thanks to his control over himself from an earlier command. He spewed a torrent of seed onto his mother and coated her entire chest and neck in a thick glaze. After an age of pulsing between Melissa's huge breasts and giving her a good spray down, Mike finally turned off the faucet.

Melissa tutted, as if he had just spilled some milk on the dining table. She released Mike's cock and got up to leave.