When they were in the living room, the youngsters stared expectantly at Billy's big sister, wondering what was going to happen next.

"Now drop your cut-offs," smiled Heather, patting her brother's head.

"Right here?" he gasped.

"Yes, right here, honey," she giggled, and then turned to Penny. "And you take your shorts and panties off."

When they'd done as Heather ordered, the two stared down at each other's pubic area. He'd had never seen anything like Penny's wet, pink slit, peeking out from the soft triangle of newly sprouting red pussy hair. The soft wisps of downy fuzz were glistening with the warm juices that were oozing out from between her deliciously moist cuntlips.

Penny was just as excited over her young friend's cock and balls. His nut-sac was a soft pink with a growth of blond cockhairs swirling around it. His stiff young prick was standing up firm and erect against his belly, throbbing wildly from the intense excitement he was feeling.

Staring at the two naked youngsters, Heather could hardly wait to see them fuck. She thoroughly envied them, wishing it was she who was about to experience her first glorious fuck again.

"Have you ever played with a girl's cute pussy?" Heather asked her kid brother, watching the way he was staring at Penny's juicy cunt.

"Heck, no," he excitedly answered. "I've never even seen one before?"

"Why don't you lay back on the couch and let Billy play with your pussy?" Heather whispered to the cute young girl.

"Will it hurt?" asked Penny.

"God, no," laughed the older girl. "You're gonna love it."

When the sweet redhead had spread out on her back with her thighs open and knees drawn back, Heather turned to Billy. "Okay, honey, it's all yours, so have a good time."

Sitting down on the edge of the sofa, the young boy reached out and lightly touched Penny's hot, wet cunt with the tip of his finger.