Misty was digging her fingers into his shoulders painfully, her thighs tight around his. Billy slipped his hands into his mother's panties from behind, feeling the satiny smoothness of her ass. He clawed at her asscheeks, spreading them, pressing them together, not knowing he was doing it. But Misty knew his hands on her ass that way increased the already fiery ecstasy she was experiencing. While she bounced her cunt up and down on his prick, her titties, still exposed, rubbed and caressed his face. Billy tilted his head, and caught one of his mother's stiff nipples with his lips, sucking it deeply.
"Ahhhh, baby, baby!" Misty cried out, one hand at the back of his head to hold his mouth tight on her tit. "Suck it! Suck that fucking tit, baby! Oh, yes, suck mother's tit! Ahhhh, my cunt, Billy, is on fire! God, what a hard-on you have!"
The other hand on his shoulder moved down and behind her. She felt his balls, still inside his pants. Feverishly she pulled them free, and smashed them into the steamy crack of her ass. She gurgled with delight to feel his young balls against her asshole, his cock throbbing so deliciously inside her squeezing cunt.
"Fuck me!" she moaned. "Ohhh, Billy, fuck me!"
Her son moaned around her tit, sucking wetly, lifting his cock up to her cunt. The fiery softness excited him, the satiny flesh inside stroking the shaft of his cock. There was a soft ripping sound as he tried to take a hand out of her panties.
"It's okay!" she breathed. "I don't care if you tear my panties, baby! Tear the fucking things off mother's ass if you want! Just don't take your big, hard cock out of my cunt! God, do I love it, Billy! Ooooh, mother's cunt is eating your cock up! My cunt loves you hard cock, darling!"
Suddenly Misty shrieked, almost scaring Billy.
She slammed down hard on him, his cock buried as deep as it would go. She screamed once more, and the convulsions exploded. The already tight lips of her cunt became tighter around his cock, squeezing and relaxing, squeezing again. Her ass strained on him.