It always thrilled her to know she was pleasing her son, and little beads of perspiration stood out on her upper lip as her hot slurping mouth sucked deeper and harder on his throbbing cockhead. As Matt always did when he became overly excited, he began slowly rocking his hips back and forth, fucking his cock in and out between his mother's sucking, pulling lips. Knowing what her son enjoyed the most about her blow-jobs, Lisa released his balls and reached back under them until she found the puckered opening between the sinewy cheeks of his ass. Wanting to please him as much as possible, she began lightly teasing her fingertip around his sensitive asshole.

"Oh, shit," he groaned with ecstasy.

"D'ya like that?" she giggled.

Knowing how it thrilled him when she fucked her finger deep into his asshole, she probed the tip of it around his tightly puckered shitter, feeling his lean hard asscheeks quivering with anticipation.

"Ram it in!" he roared, unable to stand the heavenly suspense any longer.

As she passionately sucked on his big juicy cock, she slipped the tip of her finger through the tight ring of his asshole.

"That's it, Mom! That's it!" he shouted with glee.

Ramming her finger all the way up his ass, Lisa sucked even harder on his lurching prick, aware that he would soon be shooting his wad.

"In here!" she suddenly squealed, releasing his cock from her mouth and pulling her finger out of his ass as she rolled onto her back and spread her shapely legs for him. "Shoot your jizz right into my hot cunt!"

"Are you ready, Mom?" he excitedly panted, crawling up between her splayed thighs.

"You bet your sweet ass I am," his mother said. "I'm ready for everything you have."

Hope couldn't believe what was happening. It was bad enough that her mother had been sucking and licking his hard cock, but the idea of letting her son fuck her was outrageous. Hope could feel her heart pounding loudly in her breast as she watched her brother's hard boner slowly advancing toward their mother's cunt.