Robbie stretched his mother's cunt as open as he could, pushing his tongue deep, wiggling it against the sensitive tissues, her clit crushed by his bottom lip, his upper lip touching his mother's asshole. It was her son's mouth and tongue sucking her cunt, and the sheer perversity of it created a mindless lust in her.

Gasping huskily, she rammed her mouth up and down his cock, fucking him with it, her lips sliding wetly, burning. Her nipples rubbed at his stomach, and she smashed them onto him, her hands gripping his tightening ass, lifting him to take his cock as deep as possible into her mouth. Her naked ass began to whip about, slam up and down. Her cunt made wet sounds, too, wet sucking sounds. She began to squeal around his cock when she felt it throb with a greater hardness. She drew upward on the shaft of his cock hard, holding the head between her lips, sucking bubbling juices out of it, her tongue scraping his piss hole, her throat swallowing.

She arched her ass, then rammed down, her movements the same as if she were on top of him with his cock in her cunt. As her son tongue-fucked her deeply, she shoved her long legs out straight, her hot thighs gripping his face, and began to rub and hump his face, grinding her cunt on his mouth. At the same time, she feverishly gobbled his cock, her face darting up and down, her lips stretched around his raging hard-on. She sucked his cock as if she couldn't get enough of it. In a way, she couldn't. She wanted it in her cunt and in her mouth at the same time, but that was impossible.

Her stomach became tight as she felt herself getting ready to come. She squirmed against his face harder, moaning around his throbbing cock. The cheeks of her ass bunched and flexed. She loved to feel his fingers between the hot checks of her ass while his tongue started racing in and out of her cunt.