Mike grabbing her nuts

Melissa was interrupted by Mike sitting up to reach around and grab her full balls. He kneaded and squeezed them gently, locking eyes in the mirror with his mom as she was swept up in bliss. Precum began to ooze from Melissa's bloated cock head as Mike pawed her churning sack.

"Rub it into your cock Mom - the precum," Mike strained, trying to stay focused as his kneading also affected himself.

Since both of their cocks shared all modifications by the device, this should still work, Mike thought.

Melissa dutifully complied, delicately slathering her foot-long fuckstick with her own juices. Mike gasped in ecstacy at his mother's phantom touch on his own cock. He watched her jerk herself and absorb the precum into her shaft, feeling each stroke as his own. The feeling of his mom jerking him off while his cock rested between her ass cheeks was unbelievable. Mike slumped back onto the bed, flooded with dopamine as Melissa pleasured them both. Out the corner of his eye, Mike saw his mom's cock suddenly pulse and then surge upwards, thickening and rising as she feverishly tugged at her shaft. Looking back at his own weapon, Mike marvelled at the same skin-rippling effect cascading down his massive writhing member, synced with each of his mom's strokes.

The sight of his busty mother stroking her growing cock just below her towel-wrapped titties and also feeling each stroke on himself was too much for Mike. He felt his overflowing balls tense up and a rushing sensation erupt from deep within them. Mike thrust his hips between his mom's ass cheeks and blasted thick ropes of cum into the air. His cock pulsed for an age as warm sticky fluid rained down, coating Melissa's ass and pooling around Mike's cock and pelvis. Mike lay motionless behind his mother, exhausted and lost in dull bliss.

Having caught on to Mike's antics, Melissa reached behind herself and began lathering her butt with his frosting-flavored seed. She scooped up as much as she could and spread it generously over her soft bum and wide hips, rubbing it in eagerly. After a brief moment, her juicy flesh began to bubble and expand, pressing warmly around Mike's cock as it lay limp on his toned abs. Mike groaned as his mother's ass swelled from an average mom bum into an enormously PHAT and fertile booty. The tops of her ass cheeks rose like bread and protruded further and further away from her back, forming a valley of cleavage to rival her huge breasts. The base of Mike's thick shaft was completely engulfed by his mom's swelling butt, disappearing in her cheek canyon. Melissa's expanding ass advanced, travelling higher and higher up Mike's stomach and mostly flaccid cock as he lay on his back. Melissa moaned and massaged her enbiggening posterior sensually in a circular motion, fingers being **** wider and wider with each passing second. At last, Melissa's ass growth slowed as it reached it's final size, each butt cheek perfectly round and slightly bigger than a medicine ball. Mike would have guessed it was fake if not for how it squished against his legs and his mom's fingers.

"Now THAT's a big booty," Melissa giggled. She wiggled her rump against Mike's dick as it lay on his stomach. Melissa hefted her ass off of Mike an inch, squeezing the underside of both cheeks with her hands, before allowing it to slam back down onto his cock and abdomen. Her magnificent cake jiggled against him for a good few seconds. Before the wild wobbling could subside, Melissa gave herself a sharp slap across one cheek, continually renewing the jelly-like jiggling.

"Come on Mike, don't you like it?" she teased.

Mike could only groan as his cock stiffened and inflated for the umpteenth time, rising up against the resistance of his mom's massive ass.