"Well," she began slowly. "Will you show me your… er… th-thing?"

"What thing?" he asked, turning his attention back to the magazine.

"You know," she said, hesitating. "Your thing… your prick."

"What?" he gasped.

"Please, Kirk," she whispered.

"Have you lost your mind?" he asked in a stunned voice.

"Please, Kirk," she begged, her little pussy getting hotter by the second. "Just let me see it."

"My God!" he gasped. "I can't believe you!"

"Please?" she persisted, reaching for his zipper.

"Stop that!" he shouted, roughly pushing her hand away. "Why the hell do you want to see my prick?"

"Because I've never seen one!" she shouted back at him.

"You're not supposed to see one," he snapped, pushing her hand away again.

"Damn you!" she shouted, her eyes blazing with frustrated anger. "If you won't, I'll get some of your friends to show me their cocks!"

"You wouldn't dare!" he gasped.

"I sure would," his little sister hissed, reaching for his zipper again. "And you know they'd be more than happy to let me play with their pricks."

Knowing that she was right, he just stared at her with disbelief as she opened his fly. While he sat in stunned silence, she reached in and gently withdrew his soft, limp cock, staring with awe at the warm prick in her trembling hands.

In spite of the circumstances, the soft touch of her fingers on his prick sent a warm, tingling glow through his cock.

The exciting feeling between her legs increased as Marci felt his prick-shaft begin to swell and throb in her hand. Staring in complete fascination, she watched his swelling purple cock-head start protruding from his foreskin. Gently squeezing his prick, she couldn't believe how big his cock was getting.

"No, Sis, this isn't right," he weakly whispered as her hand began moving up and down the length of his fully erect cock.

The young girl had never been so excited in her life, and she was finding it difficult to breathe as her fingers explored every bump and vein on his big blood-engorged prick. Slowly skimming the soft foreskin up and down over his throbbing cock-shaft, she rubbed his deliciously hot cock-head against her soft, warm cheeks, up through her hair, under her chin and lightly across her moistly parted lips as his body trembled and lurched with ecstasy.