"Yeah, I sure do," Biff said. "How is Sandy, anyhow?"

"Oh, she's fine," Marge said. "She's away at college, but she'll be coming home in a few weeks for the summer. You wouldn't recognize her – she's turned into quite a woman."

If she turned out anything like her mother, she must be a hot chick, Biff thought.

Suddenly, Biff remembered that Marge Berg was the first woman he had seen naked besides his mother. That memory came back like a sock in the jaw.

"I remember how you and Sandy used to play together in the yard," Marge was saying.

But Biff was hardly paying any attention now. In mind was occupied with the memory of how he had once stumbled onto Marge, naked in front of her bedroom mirror.

Biff hadn't thought about that scene in a long time. In fact, he must have ignored that memory because it was so strange. He hadn't only seen Marge naked – she had been doing something to herself. Now, with Marge's voice in his ear, Biff understood just what it was he had seen.

He could see Marge again in his vivid memory. She was standing naked, in front of her mirror. Biff had seen his mother naked often, so the sight of a naked lady didn't seem unusual. But Marge was holding herself, and moving in a funny way.

Biff remembered how puzzled he had been as he watched. It looked as though she were washing herself. But she couldn't have been washing in the bedroom. Still, her hand had definitely been scrubbing her cunt. Her other hand held one of her tits. And her hips were moving back and forth.

Jerking off was something Biff had never dreamed of in those days. And since he had discovered jerking off, he hadn't once thought about that strange scene he had witnessed.

But now, suddenly and startlingly, he understood. He had caught Marge jerking off and hadn't even realized it.