Her slender back arched and her plump tits swung up and down, the tips swollen and distended.

His lips were plastered to her pussy like a rubber plunger on a clogged drain as he sucked her juices out. His throat pulsed as he swallowed.

Rachel yearned to have her son's mouth on her own muff – and to sink her tongue into her steamy fuckhole, as well.

"Cum, Sis! Cum!" Chuck gurgled, his voice muffled on her soaking cunt.

"Creamin', Brother! Ooooooh – drink me!"

The waves of joy came rushing across her loins and shot up her trembling thighs. Her pussy simmered and smoldered and dissolved at the depths.

Cunt-cum swirled down her chute and came flooding into her brother's panting mouth in a deluge.

She drained off and slumped, her head down, her chin resting on the slopes of her tits.

Chuck raised his head up, still stuck to her cunt. His mouth seemed to be glued in her groin by a paste of pussy-nectar and saliva.

He kept on dining in her pussy as she swayed on his face, moaning in rapture.

Frostie reached down below her blonde bush and fingered around, feeling his tongue and lips as they worked in her sodden cunt. She took her clit between thumb and forefinger and whipped it against his tongue.

Then she groped behind her back and got a handful of his cock, and balls.

Her randy sibling was fully aroused again.

She slid back and her pussy pulled from his mouth with a juicy slurping sound, breaking the suction. She squatted back on his lean belly and gazed down at his face. They smiled at each other in tacit understanding.

"Ready for a fuck?" Frostie asked.

"You know it is, Sis!" he enthused.

Now, with some last vestige of parental concern or maternal instinct, their mother wondered if she should prevent her kids from screwing.

Oral sex was very naughty, but she figured that fucking was the ultimate incest, a sin she should stop.