"Christ, that feels good," Charlie moaned, leaning back against the wall.

"Do you like Diane's naughty little tongue?" she teased, swirling it around the bloated cock-head.

"Shit, yes," he gasped, his legs trembling with excitement.

Robin couldn't believe it when she watched her mother open her mouth wide and slide her lips over the big cock. The young girl was fascinated as she watched the big saliva-drenched cock slithering in and out of her mother's lips.

Removing the swollen cock-head from her mouth, Diane vigorously licked the entire underside of his dick.

"Jesus Christ," Charlie moaned as Robin watched her mother begin licking his balls. Diane licked and sucked until the crinkly skin glistened with spit.

Despite her disgust, Robin felt small tremors of excitement rippling through her loins. She found the sound of her mother's sucking and slurping quite erotic.

"Now, baby," Diane whispered as she put the big cock-head back in her mouth, "you're gonna get the best blow-job you've ever had."

"Suck me good, honey, suck me good," he gasped, bracing his back against the wall.

Her head began bobbing frantically over the glistening shaft, taking it deeper into her mouth with every lurch. Her hair was flying wildly around her face as her mouth slid faster and faster over his wet cock.

"Jesus Christ," he groaned, thrusting his cock up to meet every plunge by her mouth. "I'm almost there, baby, almost there."

"Squirt me good, honey," she squealed between slurps. "Fill me up! Shoot me full!"

"Suck, damn you, suck," he gasped as he grabbed her hair, pumping her up and down over his cock.

"Squirt me, baby, squirt me full," she continued screaming as she frantically sucked the thrusting rod.

When Charlie gave a final lunge and his body began jerking against her mother's face, Robin realized that he was firing his load into her mother's throat. She knew for certain when she saw the thick, white cum dribbling out the corner of her mother's mouth.