Telling herself she was, crazy, Joan knew she wanted her son's cock. It felt as if she could feel that beautiful hardness already sliding into her cunt, stretching it, filling it. She moaned in a throaty sound, her legs shaking.

"Let me fuck you, Mom," Billy asked in a small, pleading voice. "Please, Mom… see how hard it is? Let me put it in you down there."

Joan knew it was useless to try and fight the struggle going on inside her brain. She wanted his cock in her cunt, she wanted her son fucking her, and she wanted it terribly. It was not all because the pretty receptionist had sucked her cunt so deliciously. Part of it was because she had not had a cock inside her cunt in many years.

She nodded her head, biting into her bottom lip.

"Really, Mom?" Billy asked, gripping his cock in a tight fist. The swollen cockhead bulged out, his piss hole wide open. She saw it beaded with a clear juice. "I can, Mom?"

Again she nodded, and her flush seemed to leave her face. Her eyes smoldered with eagerness, fixed upon the head of his cock.

"Yes," she whispered.

Billy stepped out of his pants and shorts, covered by his shirt only now. Joan felt her cunt pulse, and she came very close to orgasm as she looked at him. Not knowing she was doing it, she sat on the edge of her bed, spreading her knees. She couldn't take her eyes off his cock. She leaned back, bracing herself with her hands behind her. She opened her knees very wide, her ass already twisting with eagerness.

"Mom, you look like that girl in the doctor's office," Billy said excitedly.

"Do it, Billy," she whispered throatily. "Do it to me, baby."

Billy, a grin spreading over his face, moved to his mother. Joan's eyes remained on his cock.

Billy stood between his mother's open legs, staring down at her hair-lined cunt, seeing the pink wetness, the tiny protrusion of her clit. Joan could feel the heat of her son's eyes on her crotch, and her naked body trembled. With a moan of hunger, she darted her hand to her son's cock, closing her fingers about it tightly. She pulled, smashing the dripping cockhead upon her rigid clit. Her eyes turned dreamy, her hips rolling as she sighed at the contact.