After a while longer, things became very quiet in the back seat. Glancing over her shoulder, she gasped.

Carolyn was leaning against her side of the car, one leg up and pushed against the back rest, the other on the floor. The crotch of her sun-suit was pulled to one side, held by a small finger. Her pink, lace-trimmed panties showed at the crotch. A grin was on her daughter's face, those blue eyes twinkling hotly. Twisting her head a bit more, she saw her son staring right at his sister's crotch, his cock pushing up at his cut-offs, very hard. He wasn't the least bit ashamed of it, Peggy noticed.

The car slowed as Peggy jerked her eyes back to the road, gripping the wheel with both hands.

"What's going on back there?" Peggy asked, her voice shaking.

"I'm showing Ricky my pussy, Mother," Carolyn giggled.

"You're what?" Peggy gasped, almost running off the road.

"I'm showing him my pussy," Carolyn repeated. "He's gonna show me his cock, too. Right, Ricky?"

Ricky made a gurgling sound, gazing at his sister's panties.

"Listen, you two," Peggy said. "You can't do that."

"Why not?" Carolyn asked. "You did last night, Mother!"

"I did not!" Peggy said, flushing slightly. "You did," Carolyn insisted. "I wasn't asleep. I knew what Ricky was doing to you, Mother. I could hear it and even peeked once!"

"Oh, my God!" Peggy gasped.

"You didn't have to tell," Ricky said. "She was asleep. Mom didn't know until you told her."